I just installed Ubuntu 11.04 32-bit on my old P4-Ati Radeon rig. Boots well, gets into desktop, however left bar and top bar are garbled. Main desktop area and windows in that area are mostly fine, however some windows such as settings window have areas that disappear when mouse-over occurs. Right click menus also are garbled.
My guess is that my AGP ATI Radeon 3-series driver has faulty implementation. What can I do?