http://browsershots.org/website/http...s.com/#success
That's my site. I use 96dpi, 1280x800 resolution and 24bit.
The windows one is the smoothest and in Vista, it is even smoother (but they show XP)
Somehow, PLD linux is a lot better by default than Ubuntu. What they do , Ubuntu should learn from. PLD linux, it does not mysteriously enlarge fonts and bold them 10x more than they should be.