iTunes 10: Screensaver starts during full-screen visualizer
Some people are reporting an issue with iTunes 10 in which the screensaver starts while they are using iTunes' visualizer in full-screen mode on connected devices like HDTVs. Prior to iTunes 10, the visualizer would take precedence on the screen display, not allowing the screensaver to start when playing, similar to a full-screen video. Apple Support Discussions user "megadot" writes:
I have my Mac Mini connected to my flat screen TV. I have my screen saver set to come on after the minimum time to protect my plasma panel. Since upgrading to iTunes 10 my screen saver starts … Read more