Are there any known issues with older/buggy browsers that claim to support gzip/deflate compression but don't handle it very well? I'm obviously only turning it on for browsers that claim to support it, but for the best user experience, I want to know if there are any browsers I should blacklist.
For some reason, I remember hearing problems about IE6 and gzip, but I'm not sure what the details were.
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The IE6 problem was that before IE6sp1 it could lose the first 2048 bytes of data in a compressed response: http://support.microsoft.com/default.aspx?scid=kb;en-us;Q312496
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Citing user Greg Dan's answer from question What is the problem with this ajax(with prototype)?:
Sometime ago I read about IE and Apache gzip module problems. It was occurring only on local installations where a server response was very fast.
Never tried anything like that myself, only read that answer recently. Maybe it helps.
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Here are some links to documents that name some browsers that don’t support compression though claiming it:
- Apache’s sample configuration in the mod_deflate module documentation
- Which browsers can handle
Content-Encoding: gzip?
Liam : That second link is dated 2003-03-11. More recent browser versions (in particular IE6 SP1) which may have bug fixes are not covered.
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