Interesting, I just recently installed Ubuntu Gutsy and noticed that the font rendering was different. It was set to software smoothing. Having a look at the different options, I discovered "subpixel rendering (LCDs)". I couldn't decide which I preferred, the software smoothing or subpixel rendering. I think I prefer the subpixel rendering after comparing painstakingly, because the software smoothing is less crisp. Of course, the nice thing about software smoothing is that it tends to be good at appearing the same as how it would look when printed on paper (so they say).