Mail.appFilter: instead of deleting messages, Mail has taken to "ghosting" them, turning them grey. I've tried the "vacuum" trick via the terminal, and eliminating the Envelope Index and reimporting all the messages (more than once), as previously suggested - but the behaviour continues, and erratically, at that. Any suggestions for getting Mail back to normal? I'm on 10.5.8, Mail is 3.6 (936), on a Macbook Pro; my accounts are both IMAP, one gmail and one work mail, which i sync to an iPhone.

The strange behaviour started in the Drafts folder (which i'm having issues with: Mail autosaves endless iterations of emails that I'm writing - first it seemed to do this when I was offline, and I guessed as it couldn't sync with the two imap servers I use, it needed to save locally, but now it seems to be doing this willynilly.)

Other things which might have some bearing on this problem:
- Mail previously showed ridiculously high counts of messages (without showing actual messages) in some folders, again, principally in Drafts, so occasionally I've deleted the thousands of files contained in "Draft" folders in Library>Mail.
- After the first elimination of Envelope Index + reimport, I now find two files, a larger, current Envelope Index and a smaller Envelope Index-1, dated at the last reimport.

Any wise hints/tips from your own experience?