This just started when I manually checked mail just now. It' now on item 1420 out of 3800.
The message viewer often says things like "updating color for 7 of 8"... then it'll go on to "Caching 1432 out of 3800"....
I've never seen this - and it's pegging the CPU on my PB G4 - with a CPU meters also showing a lot of upload and download activity: so I guess its re-comparing things with the .mac db.
Does this maybe have anything to do with the move to me.com ?
Guess I'll go for a latte while my CPU is keeping so busy.