MAC reboots when I try to back up to TM after upgrading to OS 10.8.

Question

I am trying to back up to TM after upgrading to OS 10.8.  I managed to do a full back up once but now every time i try to back up the MAC reboots.  This is the 4th time today.

Answer 1

These messages:
31/07/2012 00:14:39.546 com.apple.backupd[317]: Starting manual backup
31/07/2012 00:14:39.775 com.apple.backupd[317]: Backing up to: /Volumes/Time Machine 2/Backups.backupdb
31/07/2012 00:14:41.009 com.apple.backupd[317]: Event store UUIDs don't match for volume: Macintosh HD
31/07/2012 00:14:41.700 com.apple.backupd[317]: Deep event scan at path:/ reason:must scan subdirs|new event db|
are normal for starting a backup. The Deep event scan happen every time, but it is perfectly normal and will only lengthen the "preparing" time.
If you look back in the log and find these messages, what we're looking for are:
1. any subsequent messages from backupd other than the inital error msg you posted
2. any unusual messages especially just prior to the first message after re-booting. The first message after re-booting look like this: "localhost bootlog[0]: BOOT_TIME nnnnnnnnnn'
One would hope that there are some messages just prior to the system re-booting itself that will give a clues as to what is causing the actual re-boot.