It is possibly an early sign of mild database corruption.
Office vX:
Hold down the option key when starting Entourage and take the first option
('typical rebuild'). If this doesn¹t resolve the problems, then try an
ŒAdvanced Rebuild¹.
Office 2004:
You still call the rebuilder by holding down Option key at launch, but it
now brings up a separate app "Database Utility" (which could be launched by
double-clicking of you wish) that lives in the Office subfolder.
First of all, if you have any Office apps open, a dialog comes up that
offers to quit them.
Then you get a window with a list of your identities to select from, and
four options:
1) It has a new feature "Verify database integrity" option: this should
reduce unnecessary rebuilding. Apparently it's quite sensitive. And see 4)
below.
2) "Compact the database". (Like X's "Typical rebuild").
3) Rebuild the database. (Like X's "Advanced Rebuild")
4) "Set database preferences". Actually there's only one pref: you can turn
on "Verify database in background "which means "run automatically" and let
you know if your database needs rebuilding.
