GZIP encoding test

Hi,

I've come up with a test for support for GZIP encoding:
http://www.w3.org/2008/04/accept-encoding-test.php

Unless I wrote it wrong, it should send back a GZIP-compressed PNG green
square on clients that claim to support it, and an uncompressed PNG red
square to others.

I can add it to the other tests (e.g. to replace the data: URI test),
but I'm concerned that test might be too easy; can someone find a
browser that gets back a red square?

[actually, I just found out that the Netfront browser on my PSP gets a
red square]

Dom