Any ideas about what might be happening would be appreciated.

Try shift booting and see if the problem still occurs.

There have been various reports of this under Panther, and I've noticed it happening on my machine occasionally.

Thanks,
Shay
--
=========================== Shay  Telfer ================================
 Perth, Western Australia   Technomancer  Join Team Sungroper in the
 Opinions for hire              [POQ]     2005 World Solar Challenge
 [EMAIL PROTECTED]         fnord     <http://sungroper.asn.au/>