I just bought a secondhand Cube (G4/500) and Apple 15" Studio Display from someone here in town. Generally I'm really excited about it! I removed the factory 40GB drive and put in a 160GB WD drive. (I've already read the CubeOwner.com FAQ's regarding that, and was only able to get the Cube to recognize 128MB of it. Bummer. But it's the only drive larger than 40GB I have.) I promptly installed Jaguar from my CD, and did Software Update all the way to 10.2.6. The Cube is running pretty well, with one exception. I am getting a disastrous number of white screens. Sometimes the white screens have lots of vertical lines across them, sometimes not. It always happens after a simple mouse click (not every mouse click, obviously, but randomly.) It happens across different apps, not just one. Most notorious for causing it is using either Safari or IE to access VersionTracker. That almost always does it. Sometimes when I get the white screen, I can still use the mouse. It doesn't look like the mouse; it looks like a square blotch. But it moves with my mouse. The computer doesn't stop working; iTunes continues to play my CD. It's just a screen thing. Any ideas on what could be causing this? I'm stumped and it's serious enough that I've got to do something about it!