I have had problems with Tommy, as well as with other discs. Sometimes it will begin skipping until it no longer plays. If I unplug the unit and give it a rest, I can then play the disc with no problems. I have 3 SACD players and have observed similar problems on all of them. It seems to be heat-related, but I don't know this, I only suspect it. I may also be that a "reboot" occurs if you unplug the unit long enough to allow the caps to discharge.
I am surprised that nobody else has come across this. It appears to be a prevalent and disappointing aspect of SACD in my home.
None of these players exhibit any problems playing redbook, either.
Also, I heard rumblings that firmware issues were the very reason Krell discontinued their SACD player.
Cheers