I've had a Marantz CD7300 for a while now, and I've noticed a couple of issues. 1. When playing MP3 CDs, it frequently just stops playing part way through the disc. No error message, nothing. Just stops at the end of a track and doesn't carry on to the next one. I guess it could be the discs (most I have are Verbatim), but it they play fine in my other players. Very frustrating. 2. It seems to get quite confused when switching discs. Particularly, when removing an MP3 disc and inserting an audio one, it will often assume the disc is a data one and will refuse to play. Powering the player on/off sorts it out. Anybody else come across these issues? Is there maybe a firmware upgrade available that I need? Thanks in advance Andy.