Sync dies from critical error; Vista, WM 5.0, Cingular 3125, Outlo

Several times a week the synchronization between my Cingular 3125 Windows
Mobile 5.0 phone and Vista's Windows Mobile Device Center gets a critical
error. I need to cycle through several screens on the phone pressing "sync"
and "OK" going through several screens of error messages about critical
errors, then reliably the phone syncs again. I lose the settings for syncing
several of my Outlook mail folders and they need to be setup again once the
sync is reset and behaving normally again. These errors can also be viewed
in Vista's sync center. I do not lose any data except for the contents of
the Outlook sync'd email folders.

This phone sync'd flawlessly always, every time, never failed, always,
flawlessly with Windows XP.

I cannot see any pattern to the failure except that it happens during the
first sync when the phone is connected to the computer either when I start
the computer and connect the phone for the first time that day or if I am
away from the running computer and reconnect the phone. Once that first sync
is successful there will not be another failure until the phone is
disconnected and reconnected. I would have to put the failure rate at about
10% of connections. I feel that Outlook for some reason is not responding to
the sync and screws up the phone leaving it unable to recover without my
intervention but I have no way of knowing this for sure, it’s just a hunch.

I am using Vista Ultimate with all updates, Outlook 2007 and the latest
WMDC. The phone has the latest firmware update as well.

Any suggestions are appreciated.