Thank you for the suggestions, Tim. >Are you using POP or IMAP?
>If POP, then you should be aware that there >are some issues regarding POP servers and corrupt email. If a piece of >email with badly formed or corrupt headers comes along, it can cause the >client to hang, quit or give up gracefully at that point. As the mail >has not been downloaded SUCCESSFULLY, it *might* still be marked as >unread. Yes, I know of this problem, but how likely is it that: A: many messages from many accounts display the problem B: Other clients can download the same material and don't have the problem ? > >Try this a solution. Log on to your server in some other way, if >possible. Delete the repeating messages and logout. Try PM again and >see what happens. Repeat for the other accounts as necessary. This is not necessary. I can delete messages with PowerMail. However, the problem may return later. In total I got 5 copies of the welcome message to PowerMail Discuss. It seems to have stopped now, however. The new mailbox had not been touched by PM 3.1.3, not even once.

