It looked like a simple bug: an OpenGL application that blinks in full screen (
http://www.taodyne.com/shop/en/blog/39-could-someone-at-amd-...). But the rest of the day was an infuriating tale of Kill All Humans installers and Beware of The Leopard DRM restrictions. And at the end of the day, an unanswered question remains. What kind of driver bug could possibly cause an OpenGL application to blink in full screen, unless the display is rotated?