I have a weird problem on my production web server running Apache on Ubuntu: it compresses my images thereby dramatically lowering their quality!
Actually I have two virtual hosts running, each located in a different folder. Wether I display .gif images by navigating on the two sites, or acceding them directly by their url, their size and quality are invariably degraded.
I tried with three different browsers: same problem. Using them on other sites on the Web: no problem. Of course I disabled mod_deflate on the server (which should not compress images anyway), but the phenomenon remains.
On my local développement server, running the same configuration, everything is Ok.
Now I'm completely lost!
For the record, my configuration: Ubuntu 10.04, Apache 2, Php 5.