I have recently noticed that if I have firefox partially covered by another window and then scroll the display in ff w/o focusing on it that the text lines sometimes gets broken up in horizontal strips when it comes out from under the window over top. I have seen this with KDE and free ATI driver on one system and on a gnome system with free nvidia ion driver. It seems worst on gnome/nvidia system. Both use the same monitor. When the ff window is totally exposed the text is fine. Didn't see anything about this in a quick look at rh bugzilla. Also, never saw this with f11. -gene
