I am having a weird java problem - For some reason quite often when I open a dialog it becomes black. When I force a repaint (for example, draging it out and into the screen
Happened to me on my ATI Radeon HD 5670 with Windows 7 64-bit.
The solution was to use the Catalyst Control Center, and turn the Antialiasing and Anisotropic filtering to "Use Application Settings" instead of the default "Override Application Settings".
This effectively turns off these features on your Java applications, and no more black screen!