Anyone else having problems with the Denon 910 freezing? It seems every 2-3 dvd's I play seem to freeze somewhere in the movie and then the unit won't forward or reverse and when I try to get the dvd out, the tray won't open. First the screen says "open", then it automatically reads "closed", then "open", then "closed"... Half the time I have to unplug the unit. This is happening way too often for a unit I've owned under 2 months. Is it a bad unit or is the 910 just a super sensitive model? My Panny RP-91 never freezes, but it won't play CDs anymore (?). When I finally do get the dvd out of the Denon and put it back in, it doesn't freeze at the same point. I don't think it's the dvds. Seems to be a player issue. Anyone else?