I've noted that when I use Safari and occaisionally in Mail.app I get distortions in the page or message list (in Mail) when I scroll through the content. (so I'm assuming it is some sort of Quartz thing)
I have a PB 1GHZ with 512MB RAM. I use Mozilla Firefod most of the time, but when I decide to try out Safari...I'm annoyed by this problem (and the lack of some other features, but that's another post).
I've attached a screen grab of an example. It seems like it's always in the same general area of the screen too...which is a little weird. I'd say the center of the distubance is roughly 1.5-2 inches above my dock (on the bottom), and maybe 3-4 inches from the left of the screen...and perhaps 3 inches across. See the attached TIFF for the example.
Has anyone else seen this??
http://www.adamwebb.com/page.jpg
[All inline images must be no wider than 480 pixels. --tooki]