OK, this has happened 4x now. I was playing music off the HD, when it stopped-- I could scroll to the next track, but it wouldn't play it. If I went to Nav, it would say it was unavailable. Also, Contacts wouldn't work. Radio/SAT would play-- within a few min it will go to Red Screen of Death, then reboot to the BMW logo. Nav/Music Collection/Contacts would work again within 10min or so, and work fine until the next time this happens.
So what say ye? Failing HD? It's under warranty and I've already made an appointment to get it looked at. Yes, I know how to reset it, but that makes no difference-- it will reboot fine and work until it decides it doesn't want to anymore.
