I looked in the system tray and saw BD icon was black. Moused over it and it said it was inactive and couldn't restart itself (VSSERV). It seemed to be running when I ran SERVICES.EXE but still ... I had to reboot it.
This is with BDAV Plus 2012, which I just installed today. Only saw it once, about I'd say 8 hours after initial install. Not seen since then. Anyone else see this sort of behavior?