Hello, This is regarding an issue seen with the implementation on shoryuken.com. I have spoken to the website administrator (MrWizard) who confirms that the only recent change on their part was an upgrade of the Xenforo software (http://shoryuken.com/forum/index.ph...ng-with-other-sub-forums.149602/#post-6172580) Currently when accessing their forums through Firefox 3.6.24 or on (an unconfirmed version) of Firefox on Mac OS X the following error is returned: Code: Content Encoding Error The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression. * Please contact the web site owners to inform them of this problem. This does not appear to be an issue in IE, Chrome, or Firefox 7.0.x or higher. To further expand on this as well, it does appear to be only the main forum page (http://shoryuken.com/forum/index.php), direct links such as the one noted above will load. Fiddler trace capturing this in 3.6.24 is available attached as SRKFF3624.zip. This may not be a defect with Xenforo, rather potentially something on the webserver side, something specific to Firefox 3.6.24, or potentially one of the ads on the site.