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51

answers:

2

The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

+1  A: 

Use a network monitor - something like Fiddler (http://www.fiddler2.com/fiddler2/) to look through the exact bytes traveling between the client and the server, and you'll be able to troubleshoot the issue easier.

Alex
Indeed. Typically the problem here is that someone isn't sending the proper Content-Encoding header OR they're trying to write the gzip stream to the client manually and messing up the integrity of the stream in some way.
EricLaw -MSFT-
A: 

From some of the comments on the PHP doc page on ob_start:

Make sure the editor you use does not add the UTF8/UTF16 BOM at the start of the scripts if you want to use ob_start("ob_gzhandler");

If those three characters are present, browsers like Firefox won't be able to decode the pages

Knowing the apparent problem, I have yet to find an adequate solution.

avdgaag