Hello! I'm trying to fix a weird problem on a friends Dual 867 mhz G4 tower. It has 1,25 gb ram, 140 gb hd (one 80 gb and one 60 gb) and the original nvidia geforce4 mx video card with 32 mb. We put Tiger on this machine a couple of months ago and until now everything was running smoothly. Since a few days it displays the operating system in a strange way. There are black squares around some random folders and the shut down/restart options under the apple menu are doubled (see screenshots). So far performance is as usual, but we are afraid this might cause more serious trouble in the future. So far I have repaired permissions and run macjanitor, a script cleaning programm, with no success. I can't run hardware test because unfortunately we do not have the original disks - yeah I know one should always keep them... but the diagnose at startup says there are no problems hardware wise either. On the system partition there is 1,32 gb of free space, not much but enough I think. Could it be the video card? Or is it some kind of software problem? I hope I have given all the information necessary, oh yes, Os is 10.4.3 and I'm currently updating to 10.4.6 but doubt this will help. Any help highly appreciated. Edit: omg, forgot the screenshots!