Bug 366023 - Content Encoding Error https://bugzilla.mozilla.org/show_bug.cgi?id=366023 seems to be hot on the trail of this problem. There's a patch that says fixes it but it won't be able to make Firefox 3 w/o more testing and investigation.

hi. After getting the problem in firefox rc1, I immediately tried opening up the same page( a wiki article) in Opera, and all I could see were encoded symbols in opera as well. Any clue? I can't get where the problem actually lies?

Here's an easier way to do this: Ctrl+F5. It's the same idea as yours, since Ctrl+F5 forces to reload without cache. Thanks for the post (without it I wouldn't have thought of this either)!

[...] There are a couple of suggested workarounds here: Getting a "Content Encoding Error" message in Firefox? | CGarvey's Blog [...]

The ctrl + F5 worked for me :P

When I have this problem, IE will read the page. Ctrl + F5 works for me too.

After installing 3.0.6 I ran into this problem. Clearing cache doesn't work for me. I have to use IE.

i'm having 'content encoding error' on FF and 'IE cannot display the webpage' in IE. does anyone know how to solve this?

my laptop has same problem, but i've install avast antivirus and avast found some infected file in windir\system32\ it was called btscs or something like that. after i removed this file evetything firefox and ie start working

Thank you Freiddie!!

I just had same problem 5 mins ago, I am a php developer in Leicester, UK and it was happening because I had a php script with some whitespace before the opening <?php tag. I removed and suddenly it worked again in explorer 8 and firefox 3.5.7!

I finally figured out, after many many hours of trial and error, and narrowed MY cause of this problem down to the fact that I run NetLimiter Lite 2.10.0 on my computer to shape my incoming traffic, so that I can still surf while I'm downloading. I found that when I disabled it, I didn't have any problems whatsoever, and when I re-enable it, problems come back. So I'm updating to 2.11.0 and hoping that will fix the problem. Good luck!

in my case, the error was caused by this line of code: ob_start("ob_gzhandler");

hi guys, this error is caused by a program that resides in C:\Windows\ and called AutoKMS.exe You can find this program by using your antivirus or anti spyware. hope this helps...

Thank you Satya-below line was the culprit ob_start(“ob_gzhandler”);