when i got my new iMac (24", 2.8GHz, 3GB RAM, 1TB HDD, with a build-to-order evil-empire dark apple logo ), one of the first things i did was pop in a lord of the rings DVD to check out the machine's moobie-playing capabilities. the movie played just fine. since then, i've ripped multiple CDs and played neverwinter nights, which requires the installation CD to remain in the optical drive. no problems there. tonight, i tried to insert movie DVDs (all legit, all playable on other machines), and my imac doesn't completely recognize them. the DVD player will start up automatically once a disc is inserted--but it'll say there's no supported DVD. there's no DVD image on the desktop or the left side of the finder window. but if i press the media eject button on the keyboard, the disc does eject. my guess is there's a system software problem. anybody else have this problem, and does anybody know of a workaround, aside from waiting for OS 10.4.11?