One of the stickies said that the servers were clunky and often go down (why they dont fix this i dont know). This is not a software problem nor an internet connection problem, they are just recycling servers.

I run quake 3 on vista..sometimes it lags (because my av will do quick random scans, or it is because my computer is still booting when i run it), but 99% of the time, it works at the same speed that it would on xp (i run a celeron (3.2ghz) with 512mb ram shared, 128mb video card, 112 gig hdd) quake...