> I did have copious amounts of mail in this box, somewhere > in the neighborhood of 3500.
Whenever I allow my IMAP mailbox to grow too large, upas also grinds to a halt. I haven't yet done justice to Erik Quanstrom's nupas to see if it makes a difference because it is too big a leap at this point in time, but you may want to put it to the test. It's in /n/sources/contrib/quanstro/src/nupas if memory serves. Be warned that it is different in the way it represents the folder, so the end results may be quite dramatic. ++L