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Junkbuster Frequently Asked Questions

By: Junkbuster Developers

$Id: faq.sgml,v 1.17 2002/03/18 03:53:53 hal9 Exp $

The FAQ document gives users and developers alike answers to frequently asked
questions about the Internet Junkbuster. Internet Junkbuster is a web proxy
with advanced filtering capabilities for protecting privacy, filtering web page
content, managing cookies, controlling access, and removing ads, banners,
pop-ups and other obnoxious Internet Junk. Junkbuster has a very flexible
configuration and can be customized to suit individual needs and tastes.
Internet Junkbuster has application for both stand-alone systems and multi-user
networks.

You can find the latest version of the document at http://
ijbswa.sourceforge.net/faq/. Please see the Contact section in the user-manual
if you want to contact the developers.

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Table of Contents
1. Frequently Asked Questions
   
    1.1. General Information
       
        1.1.1. What is this new version of Junkbuster?
        1.1.2. How does it differ from the old Junkbuster?
        1.1.3. What are some of the new features?
        1.1.4. What is a "proxy"? How does Junkbuster work?
        1.1.5. My browser does the same things as Junkbuster. Why should I use
            Junkbuster at all?
        1.1.6. Is there is a license or fee? What about a warranty?
            Registration?
       
    1.2. Installation
       
        1.2.1. Can I install the new Junkbuster over the old one?
        1.2.2. I just installed Junkbuster. Is there anything special I have to
            do now?
        1.2.3. What is the proxy address of Junkbuster?
        1.2.4. I just installed Junkbuster, and nothing is happening. All the
            ads are there. What's wrong?
       
    1.3. Configuration
       
        1.3.1. Can I use my old config files?
        1.3.2. What is an "actions" file?
        1.3.3. How are actions files configured? What is the easiest way to do
            this?
        1.3.4. What are the differences between ijb-intermediate.action,
            ijb-basic.action, etc.?
        1.3.5. Why can I change the configuration with a browser? Does that not
            raise security issues?
        1.3.6. How can I set up Junkbuster to act as a proxy for my LAN?
        1.3.7. Instead of ads, now I get a Junkbuster logo [or checkerboard]. I
            don't want to see anything.
        1.3.8. Why would anybody want to see the logo or checkerboard?
        1.3.9. I see large red banners on some pages that say "Blocked". How do
            I get rid of this?
       
    1.4. Misc
       
        1.4.1. I noticed considerable delays in page requests compared to the
            old IJB. What's wrong?
        1.4.2. What is the "http://i.j.b/"?
        1.4.3. I get the message 'Bad File Descriptor', why?
        1.4.4. How do I chain Junkbuster with other proxies (e.g. squid)?
        1.4.5. I would like to help you, what do I do?
        1.4.6. Do you still maintain the blocklists?
        1.4.7. How can I submit new ads?
        1.4.8. How can I hide my IP address?
        1.4.9. Can Junkbuster guarantee I am anonymous?
        1.4.10. Might some things break because header information is being
            altered?
        1.4.11. Can Junkbuster act as a "caching" proxy to speed up web
            browsing?
        1.4.12. The Junkbuster logo that replaces ads is very blocky and ugly
            looking. Can't a better font be used?
        1.4.13. I have large empty spaces now where ads used to be. Why does
            Junkbuster leave these large gaps?
        1.4.14. How can Junkbuster filter HTTPS URLs?
        1.4.15. Junkbuster runs as a "server". How secure is it? Do I need to
            take any special precautions?
        1.4.16. What is a "re_filterfile"?
       
    1.5. Troubleshooting
       
        1.5.1. I just upgraded and am getting "connection refused" with every
            web page?
        1.5.2. I just added a new rule, but the steenkin ad is still getting
            through. How?
        1.5.3. One of my favorite sites does not work with Junkbuster. What can
            I do?
        1.5.4. What time is it?
       
2. Contact the developers
3. Copyright and History
4. See also

1. Frequently Asked Questions

1.1. General Information

1.1.1. What is this new version of Junkbuster?

The original Internet Junkbuster (tm) is a coyrighted product of Junkbusters
Corporation. Development of this effort stopped some time ago as of version
2.0.2. Stefan Walherr started the ijbswa project on Sourceforge to rekindle
development. Other developers subsequently joined with Stefan, and have since
added many new features, refinements and enhancements.

The new Junkbuster started with the same code base, but has changed
significantly at this point.

-------------------------------------------------------------------------------

1.1.2. How does it differ from the old Junkbuster?

All the old features remain. The new Junkbuster still blocks ads and banners,
still manages cookies, and still helps protect your privacy. But, these are all
enhanced, and many new features have been added, all in the same vein.

The configuration has changed significantly as well. This is something that
users will notice right off the bat. The "blocklist" file does not exist any
more. This is replaced by "actions" files, such as ijb.actions. This is where
most of the per site configuration is now.

-------------------------------------------------------------------------------

1.1.3. What are some of the new features?

  * Integrated browser based configuration and control utility (http://i.j.b).
    Browser-based tracing of rule and filter effects.
   
  * Blocking of annoying pop-up browser windows.
   
  * HTTP/1.1 compliant (most, but not all 1.1 features are supported).
   
  * Support for Perl Compatible Regular Expressions in the configuration files,
    and generally a more sophisticated and flexible configuration syntax over
    previous versions.
   
  * GIF de-animation.
   
  * Web page content filtering (removes banners based on size, invisible
    "web-bugs", JavaScript, pop-ups, status bar abuse, etc.)
   
  * Bypass many click-tracking scripts (avoids script redirection).
   
  * Multi-threaded (POSIX and native threads).
   
  * Auto-detection and re-reading of config file changes.
   
  * User-customizable HTML templates (e.g. 404 error page).
   
  * Improved cookie management features (e.g. session based cookies).
   
  * Builds from source on most UNIX-like systems. Packages available for: Linux
    (RedHat, SuSE, or Debian), Windows, Sun Solaris, Mac OSX, OS/2, HP-UX 11
    and AmigaOS.
   
  * In addition, the configuration is much more powerful and versatile
    over-all.
   
-------------------------------------------------------------------------------

1.1.4. What is a "proxy"? How does Junkbuster work?

When you connect to a web site with Junkbuster, you are really connecting to
your locally running version of Junkbuster. Junkbuster intercepts your requests
for the web page, and relays that to the "real" web site. The web site sends
the HTTP data stream back to Junkbuster, where Junkbuster can work its magic
before it relays this data back to your web browser.

Since Junkbuster sits between you and the WWW, it is in a position to intercept
and completely manage all web traffic and HTTP content before it gets to your
browser. Junkbuster uses various programming methods to do this, all of which
is under your control via the various configuration files and options.

-------------------------------------------------------------------------------

1.1.5. My browser does the same things as Junkbuster. Why should I use
Junkbuster at all?

Modern browsers do indeed have some of the same functionality as Junkbuster.
Maybe this is adequate for you. But Junkbuster is much more verstatile and
powerful, and can do a number of things that browsers just can't.

In addition, a proxy is good choice if you use multiple browsers, or have a LAN
with multiple computers. This way all the configuration is in one place, and
you don't have to maintain a similar configuration for possibly many browsers.

-------------------------------------------------------------------------------

1.1.6. Is there is a license or fee? What about a warranty? Registration?

Junkbuster is licensed under the GNU General Public License (GPL). It is free
to use, copy, modify or distribute as you wish under the terms of this license.
See http://www.gnu.org/copyleft/gpl.html for specifics.

There is no warranty of any kind, expressed, implied or otherwise. That is
something that would cost real money ;-) There is no registration either.
Junkbuster really is free in every respect!

-------------------------------------------------------------------------------

1.2. Installation

1.2.1. Can I install the new Junkbuster over the old one?

We recommend you uninstall the old Junkbuster first to minimize conflicts and
confusion. You may want to save your old configuration files for future
reference. The configuration is substantially changed.

See the user-manual for platform specific installation instructions. [FIXME:
This is meant for after the name change for 3.0!]

-------------------------------------------------------------------------------

1.2.2. I just installed Junkbuster. Is there anything special I have to do now?

All browsers must be told to use Junkbuster as a proxy by specifying the
correct proxy address and port number in the appropriate configuration area for
the browser. See below. 

-------------------------------------------------------------------------------

1.2.3. What is the proxy address of Junkbuster?

If you set up the Junkbuster to run on the computer you browse from (rather
than your ISP's server or some networked computer on a LAN), the proxy will be
on "localhost" (which is the special name used by every computer on the
Internet to refer to itself) and the port will be 8118 (unless you have told
the Internet Junkbuster to run on a different port with the listen-address
config option).

When configuring your browser's proxy settings you typically enter the word
"localhost" in the boxes next to "HTTP" and "Secure" (HTTPS) and then the
number "8118" for "port". This tells your browser to send all web requests to
"Junkbuster" instead of directly to the Interenet.

Junkbuster can also be used to proxy for a Local Area Network. In this case,
your would enter either the IP address of the LAN host where Junkbuster is
running, or the equivalent hostname. Port assignment would be same as above.

Junkbuster does not currently handle protocols such as FTP, SMTP, IM, IRC, ICQ,
or other Internet protocols.

-------------------------------------------------------------------------------

1.2.4. I just installed Junkbuster, and nothing is happening. All the ads are
there. What's wrong?

Did you configure your browser to use Junkbuster as a proxy? It does not sound
like it. See above. You might also try flushing the browser's caches to force a
full re-reading of pages. You can verify that Junkbuster is running, and your
browser is correctly configured by entering the special URL: http://i.j.b/.
This should give you a banner that says "This is the Internet JUNKBUSTER" and
access to Junkbuster's internal configuration. If you see this, then you are
good to go. If not, the browser or Junkbuster are not set up correctly. 

-------------------------------------------------------------------------------

1.3. Configuration

1.3.1. Can I use my old config files?

There are major changes to Junkbuster configuration from version 2.0.x to 2.9.x
and later. The older files will not work at all. If this is the case, you will
need to re-enter your old data into the new configuration structure. This is
probably also a good recommendation even if upgrading from 2.9.x to 3.x since
there were many minor changes along the way.

-------------------------------------------------------------------------------

1.3.2. What is an "actions" file?

"actions" files are where various actions that Junkbuster might take, are
configured. Typically, you would define a set of default actions that apply to
all URLs, then add exceptions to these defaults.

Actions can be defined on a per site basis, or for groups of sites. Actions can
also be grouped together and then applied to one or more sites. There are many
possible actions that might apply to any given site. As an example, if we are
blocking cookies as one of our default actions, but need to accept cookies from
a given site, we would define this in our "actions" file. 

Junkbuster comes with several default actions files, with varying degrees of
filtering and blocking, as starting points for your own configuration (see
below).

-------------------------------------------------------------------------------

1.3.3. How are actions files configured? What is the easiest way to do this?

The easiest way to do this, is to access Junkbuster with your web browser at 
http://i.j.b/, and then select "Edit the actions list" from the selection list.
You can also do this by editing the appropriate file with a text editor.

Please see the user-manual for a detailed explanation of these and other
configuration files, and their various options and syntax.

-------------------------------------------------------------------------------

1.3.4. What are the differences between ijb-intermediate.action,
ijb-basic.action, etc.?

Configuring the Internet Junkbuster is not easy. To help you get started, we
provide you with three different default configurations. The following table
shows you, which features are enabled in each configuration.

Table 1. Default Configurations

+------------------------------------------------------------------------------------------------+
|Feature             |ijb.action    |ijb-basic.action|ijb-intermediate.action|ijb-advanced.action|
|--------------------+--------------+----------------+-----------------------+-------------------|
|ad-filtering        |?             |x               |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|blank image         |?             |x               |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|de-animate GIFs     |?             |x               |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|referer forging     |?             |x               |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|jon's               |?             |x               |x                      |x                  |
|+no-cookies-keep    |              |                |                       |                   |
|(i.e. session       |              |                |                       |                   |
|cookies only)       |              |                |                       |                   |
|--------------------+--------------+----------------+-----------------------+-------------------|
|no-popup windows    |?             |                |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|fast redirects      |?             |                |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|hide-referrer       |?             |                |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|hide-useragent      |?             |                |x                      |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|content-modification|?             |                |                       |x                  |
|--------------------+--------------+----------------+-----------------------+-------------------|
|feature-x           |?             |                |                       |                   |
|--------------------+--------------+----------------+-----------------------+-------------------|
|feature-y           |?             |                |                       |                   |
|--------------------+--------------+----------------+-----------------------+-------------------|
|feature-z           |?             |                |                       |                   |
+------------------------------------------------------------------------------------------------+

-------------------------------------------------------------------------------

1.3.5. Why can I change the configuration with a browser? Does that not raise
security issues?

What I don't understand, is how I can browser edit the config file as a regular
user, while the whole /etc/junkbuster hierarchy belongs to the user
"junkbuster", with only 644 perms.

When you use the browser-based editor, JunkBuster itself is writing to the
config files. Because JunkBuster is running as the user "junkbuster", it can
update the config files.

If you don't like this, setting "enable-edit-actions 0" in the config file will
disable the browser-based editor. If you're that paranoid, you should also
consider setting "enable-remote-toggle 0" to prevent browser-based enabling/
disabling of JunkBuster.

Note that normally only local users can connect to JunkBuster, so this is not
(normally) a security problem.

-------------------------------------------------------------------------------

1.3.6. How can I set up Junkbuster to act as a proxy for my LAN?

By default, Junkbuster only responds to requests from localhost. To have it act
as a server for a network, this needs to be changed in the main config file
where the Junkbuster configuration is located. In that file is a
"listen-address" option. It may be commented out with a "#" symbol. Make sure
it is uncommented, and assign it the address of the LAN gateway interface, and
port number to use:

  listen-address  192.168.1.1:8118                                             
                                                                               

Save the file, and restart Junkbuster. Configure all browsers on the network
then to use this address and port number.

-------------------------------------------------------------------------------

1.3.7. Instead of ads, now I get a Junkbuster logo [or checkerboard]. I don't
want to see anything.

This is a configuration option for images that Junkbuster is stopping. You have
the choice of the Junkbuster logo, a checkerboard pattern (this scales better),
a transparent 1x1 GIF image, or a custom URL or your choice.

If you want to see nothing, then change the "+image-blocker" action to
"+image-blocker{blank}". This can done from the "Edit Actions List" selection
at http://i.j.b/. Or by hand editing the appropriate actions file. This will
only effect what is defined as "images" though.  

-------------------------------------------------------------------------------

1.3.8. Why would anybody want to see the logo or checkerboard?

This can be helpful for troubleshooting problems. It might also be good for
anyone new to Junkbuster so that they can see if their favorite pages are
displaying correctly, and Junkbuster is not inadvertantly removing something
important.

-------------------------------------------------------------------------------

1.3.9. I see large red banners on some pages that say "Blocked". How do I get
rid of this?

These are URLs that match something on "Junkbusters" block list. It is meant to
be a warning, and they are handled differently than what has been defined as
"images" (e.g. ad banners). If you want them to be treated as images, so that
they can be invisible, then move the offending URL from the "+block" section to
the "+image-block" section of your actions file. Alternately, you could modify
the "block" HTML template that is used by Junkbuster to display this, and make
it something more to your liking. 

-------------------------------------------------------------------------------

1.4. Misc

1.4.1. I noticed considerable delays in page requests compared to the old IJB.
What's wrong?

Using the default filtering configuration, I noticed considerable delays in
page requests compared to the old IJB. Loading pages with large contents seemed
to take forever, then suddenly delivering all the content at once.

The whole content must be loaded in order to filter, and nothing is is sent to
the browser during this time. The loading time does not really change in real
numbers, but the feeling is different, because most browsers are able to start
rendering incomplete content, giving the user a feeling of "it works".

To modify the content of a page (i.e. make frames resizeable again, etc.) and
not just replace ads, the Internet Junkbuster needs to download the entire page
first, do its content magic and then send the page to the browser.

-------------------------------------------------------------------------------

1.4.2. What is the "http://i.j.b/"?

Since JunkBuster sits between your web browser and the Internet, it can be
programmed to handle certain pages specially.

With recent versions of JunkBuster (version 2.9.x), you can get some
information about JunkBuster and change some settings by going to http://i.j.b/
or, equivalently, http://ijbswa.sourceforge.net/config/ (Note that i.j.b is far
easier to type but may not work in some configurations).

These pages are *not* forwarded to a server on the internet - instead they are
handled by a special web server which is built in to JunkBuster.

If you are not running JunkBuster, then http://i.j.b/ will fail, and http://
ijbswa.sourceforge.net/config/ will return a web page telling you you're not
running JunkBuster.

If you have version 2.0.2, then the equivalent is http://example.com/
show-proxy-args (but you get far less information, and you should really
consider upgrading to 2.9.x).

-------------------------------------------------------------------------------

1.4.3. I get the message 'Bad File Descriptor', why?

Fillme.

-------------------------------------------------------------------------------

1.4.4. How do I chain Junkbuster with other proxies (e.g. squid)?

Fillme.

-------------------------------------------------------------------------------

1.4.5. I would like to help you, what do I do?

Well, helping the team is always a good idea. We welcome new developers, RPM
gurus or documentation makers. Simply get an account on sourceforge.net and
mail your id to the developer mailing list. Once we have added you to the team,
you'll have write access to the CVS repository, and together we'll find a
suitable task for you.

-------------------------------------------------------------------------------

1.4.6. Do you still maintain the blocklists?

No. The format of the blocklists has changed significantly in the versions
2.9.x. Once we have released the new version, there will again be blocklists
that you can update automatically.

-------------------------------------------------------------------------------

1.4.7. How can I submit new ads?

As of now, please discontinue to submit new ad blocking infos. Once we have
released the new version, there will again be a form on the website, which you
can use to contribute new ads.

-------------------------------------------------------------------------------

1.4.8. How can I hide my IP address?

You cannot hide your IP address with Junkbuster or any other software, since
the server needs to know your IP address to send the answer to you.

Fortunately there are many publicly usable anonymous proxies out there, which
solve the problem by providing a further level of indirection between you and
the web server, shared by many people and thus letting your requests "drown" in
white noise of unrelated requests as far as user tracking is concerned.

Most of them will, however, log your IP address and make it available to the
authorities in case you abuse that anonymity for criminal purposes. In fact you
can't even rule out that some of them only exist to *collect* information on
(those suspicious) people with a more than average preference for privacy.

You can find a list of anonymous public proxies at multiproxy.org and many more
through Google.

-------------------------------------------------------------------------------

1.4.9. Can Junkbuster guarantee I am anonymous?

No. Your chances of remaining anonymous are greatly improved, but unless you
are an expert on Internet security it would be safest to assume that everything
you do on the Web can be traced back to you.

Junkbuster can remove various information about you, and allows you more
freedom to decide which sites you can trust. But it's still possible that web
sites can find out who you are. Here's one way this can happen.

A few browsers disclose the user's email address in certain situations, such as
when transferring a file by FTP. Junkbuster does not filter FTP. If you need
this feature, or are concerned about the mail handler of your browser
disclosing your email address, you might consider products such as NSClean.

Browsers available only as binaries could use non-standard headers to give out
any information they can have access to: see the manufacturer's license
agreement. It's impossible to anticipate and prevent every breach of privacy
that might occur. The professionally paranoid prefer browsers available as
source code, because anticipating their behavior is easier. Trust the source,
Luke!

-------------------------------------------------------------------------------

1.4.10. Might some things break because header information is being altered?

Definitely. More and more sites use HTTP header content to decide what to
display and how to display it. There is many ways that this can be handled, so
having hard and fast rules, is tricky.

"USER AGENT" in particular is often used in this way to identify the browser,
and adjust content accordingly. Changing this now is not recommended, since so
many sites do look for this. You may get undesirable results by changing this.

For instance, different browsers use different encodings of Russian and Czech
characters, certain web servers convert pages on-the-fly according to the User
Agent header. Giving a "User Agent" with the wrong operating system or browser
manufacturer causes some sites in these languages to be garbled; Surfers to
Eastern European sites should change it to something closer. And then some page
access counters work by looking at the "REFERER" header; they may fail or break
if unavailable. The weather maps of Intellicast have been blocked by their
server when no "REFERER" or cookie is provided, is another example. There are
many, many other ways things can go wrong when trying to fool a web server.

If you have problems with a site, you will have to adjust your configuration
accordingly. Cookies are probably the most likely adjustment that may be
required, but by no means the only one. 

-------------------------------------------------------------------------------

1.4.11. Can Junkbuster act as a "caching" proxy to speed up web browsing?

No, it does not have this ability at all. You want something like Squid for
this. And, yes, before you ask, Junkbuster can co-exist with other kinds of
proxies like "Squid".

-------------------------------------------------------------------------------

1.4.12. The Junkbuster logo that replaces ads is very blocky and ugly looking.
Can't a better font be used?

This is not a font problem. The logo is an image that is created by Junkbuster
on the fly. So as to not waste memory, the image is rather small. The
blockiness comes when the image is scaled to fill a largish area. There is not
much to be done about this, other than to use one of the other "imageblocker"
directives: pattern, blank, or a URL of your chosing.

-------------------------------------------------------------------------------

1.4.13. I have large empty spaces now where ads used to be. Why does Junkbuster
leave these large gaps?

It would be easy enough to just eliminate this space altogether, rather than
fill it with blank space. But, this would create problems with many pages that
use the overall size of the ad to help organize the page layout and position
the various components of the page where they were intended to be. It is best
left this way. 

-------------------------------------------------------------------------------

1.4.14. How can Junkbuster filter HTTPS URLs?

This is a limitation since HTTPS transactions are encrypted SSL sessions
between your browser and the secure site, and are meant to be reliably secure
and private. This means that all cookies and HTTP header information are also
encrypted from the time they leave your browser, or the site. Junkbuster does
not try to unencrypt this information, so it just passes through as is.
Junkbuster can still catch images and ads that are embedded in the SSL stream
though. 

-------------------------------------------------------------------------------

1.4.15. Junkbuster runs as a "server". How secure is it? Do I need to take any
special precautions?

There are no known exploits that might effect Junkbuster. On Unix-like systems,
Junkbuster can run as a non-privileged user, which is how we recommend it be
run. Also, by default Junkbuster only listens to requests from "localhost". It
is not itself directly exposed to the Internet in this configuration. If you
want to have Junkbuster serve as a LAN proxy, this will have to be opened up to
allow for LAN requests. In this case, we'd recommend you specify only the LAN
gateway address, e.g. 192.168.1.1 in the main Junkbuster config file. All LAN
hosts can then use this as their proxy address in the browser proxy
configuration. In this way, Junkbuster will not listen on any external ports.
Of course, a firewall is always good too. Better safe than sorry. 

-------------------------------------------------------------------------------

1.4.16. What is a "re_filterfile"?

The "re_filterfile" is used to "filter" any page content. By "filtering" we
mean it can modify, remove, or change anything on the page, including HTML
tags, and JavaScript. Regular expressions are used to accomplish this. This is
potentially a very powerful feature, but requires some expertise. 

If you are familiar with regular expressions, and HTML, you can look at the
provided re_filterfile with a text editor and see some of things it can be used
for. 

Presently, there is no GUI editor option for this part of the configuration. 

-------------------------------------------------------------------------------

1.5. Troubleshooting

1.5.1. I just upgraded and am getting "connection refused" with every web page?

Either Junkbuster is not running, or your browser is configured for a different
port than what Junkbuster is using.

The old Junkbuster used port 8000 by default. This has been changed to port
8118 now, due to a conflict with NAS (Network Audio Service), which uses port
8000. If you haven't, you need to change your browser to the new port number,
or alternately change Junkbuster's "listen-address" setting in the config file
used to start Junkbuster.

-------------------------------------------------------------------------------

1.5.2. I just added a new rule, but the steenkin ad is still getting through.
How?

If the ad had been displayed before you added its URL, it will probably be held
in the browser's cache for some time, so it will be displayed without the need
for any request to the server. The best thing to do is try flusing the
browser's caches. And then try again.

If this doesn't help, you probably have an error in the rule you applied. Try
pasting the full URL of the offending ad into http://ijbswa.sourceforge.net/
config/show-url-info and see if any actions match your new rule. 

-------------------------------------------------------------------------------

1.5.3. One of my favorite sites does not work with Junkbuster. What can I do?

First verify that it is indeed a Junkbuster problem, by disabling Junkbuster
filtering and blocking. Go to http://i.j.b/ and click on "Toggle Junkbuster On
or Off", then disable it. Now try that page again.

If still a problem, go to "Show which actions apply to a URL and why" from 
http://i.j.b/ and paste the full URL of the page in question into the prompt.
See which actions are being applied to the URL. Now, armed with this
information, go to "Edit the actions list". Here you should see various
sections that have various "Junkbuster" features disabled for specific sites.
Disabled "actions" will have a "-" (minus sign) in front of them. Add your
problem page URL to one of these sections that looks like it is disabling the
feature that is causing the problem. Re-try the page. There might be some trial
and error involved. 

Alternately, if you are comfortable with a text editor, you can accomplish the
same thing by editing the appropriate "actions" file. 

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1.5.4. What time is it?

Time for you to go!

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2. Contact the developers

Please see the user manual for information on how to contact the developers.

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3. Copyright and History

Please see the user manual for information on Copyright and History.

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4. See also

Please see the user manual for information on references.