I'm still not convinced. [1] I wrote a quick program [2] to act as a webserver (it serves up the same page reguardless of what you request) and had it log the request the client sends it. I got this from the most widely used browser:
GET /~spc/bm/ HTTP/1.1 Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */* Accept-Language: en-us Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98; DigExt) Host: linus.slab.conman.org Connection: Keep-Alive
Nothing about screen size or resolution as far as I can see.