Has anyone had this problem?  Maybe it's the BDP-1, maybe not.  Anyway, here's what happens:  I'm listening to some music and all of a sudden the music just stops, right in the middle of a song. I pick up my IPad or IPod touch to try to start it again (I can use either) but nothing happens.  So, I turn the BDP-1 off, and then turn it on again.  It initializes and finally says "Bryston BDP-1."  At that point, I can select a new album, hit "play album," and all is well.  
This has happened to me three or four times, both with the attached portable drive and with a flash drive, so I suspect it isn't the drive.