I also got the problem. Second time already, since i Installed Beta 2, RC1 and RC1 5728.
But here is what I noticed:
Installed Beta 2...updated was fine
Installed O2k7 Beta 2 on Beta 2 and update was skrewed
Installed RC1...updated was finde
Never installed O2k7 Beta and everything worked
Installed RC1 5728...update was fine
Installed O2k7 Beta 2 + TCR and the update was skrewed again!
Are you runnung O2k7?
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