I'm using the latest "radeon" drivers from ubuntu intrepid, along with the corresponding mesa and xorg packages. My card is a Mobility Radeon X1400. I get screen redraw problems like the attached screenshot. This happens with both EXA and XAA, and with Compiz and Metacity (tried all 4 combinations).
I should probably mention that the only app I see this problem with is Evolution, and only the mail compose window. Has anyone seen similar problems/ know of any workarounds?