[PLUG] Mozilla Mail / IMAP troubles

[Matt Alexander]

I have users that have lots of subfolders in Mozilla mail.  When they move
messages to a folder, the messages don't show up.  Some folders will
appear empty.  They can go into the IMP webmail and see all the messages
in each folder, however.  But for some reason these messages aren't
showing up in some of the folders (some folders work fine and have their
messages).
We're using Courier IMAP and Postfix on the server.  Mozilla 1.6 on Win2K.

Has anyone encountered this before?
Thanks,
~M