Anyone got the time?

Can anyone definitively tell me when/on what occasions panther and tiger clients do time lookups? Lookups don't seem to occur at startup or login, only when forced from Date & Time pane. No problem doing a successful ntptrace in Terminal.

A cron job to force time lookups probably won't work - think about it...

Will tiger clients bound to OD do lookups upon login? This is a nice feature on Windows clients bound to an AD.