User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.5) Gecko/20030925 Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.5) Gecko/20030925 Empty messages with a null date (1/1/1970 9:00 a.m.) can appear in IMAP and POP inboxes. These cannot be deleted. (Sometimes deleting one will make it go away, but it will reappear when the mailbox is refreshed.) Sometimes several of these will appear in a single mailbox. Reproducible: Didn't try Steps to Reproduce: 1. 2. 3. Expected Results: These empty messages should not appear in the mailboxes. I believe they represent extra, spurious entries in the mailbox rather than actual messages.

try to compact: File -> Compact Folders otherwise delete the .msf file from your imap/pop directory

This is already filed.....

*** This bug has been marked as a duplicate of 209501 ***

with the fix in bug 209501, you should be able to delete the phantom message(s), but I still don't know how they're getting in the db. If you have any idea what happens before these messages get added, that would be very helpful to me.