New 650, all conduits off except Entourage overwrites Handheld for Calendar only. No data gets transferred; Missing Sync quits with:

An unknown error #16394 occurred
?Failed Entourage Conduit (0x400a)

Anybody know what's going on here?

Tried repairing permissions; no help.
Looked for recurring events with no end date; found none.

Any other suggestions?
Thanks,
Barry