Hi all.
I've stated that zlib-compression feature is not correctly implemented, because the HTML header must be something like this:

.....
Content-type: text/html
Content-encoding: gzip


Now, php zlib-compression feature don't work with IE, Konqueror, and probably other few browsers, because it send "Content-encoding: gzip" BEFORE "Content-type: mimetype".

Bytheway, the zlib compression is a good enhancement for those who are not using mod_gzip module.

Ok, good luck. Paolo