[Evolution] Duplicate Emails

["John Paul Walters" <JWALTERS alumnimail albion edu>]

Occasionally I find that Evolution will hang when trying to download email from one of my POP mail accounts.  
This usually results in my having to kill and restart Evolution.  Unfortunately this often results in 
Evolution re-downloading my entire POP mailbox rather than just downloading those messages that haven't been 
retrieved.  I keep my messages on the POP server for awhile, so when this happens Evolution will often 
re-download 2000 messages or more(however many happen to be in the mailbox at the time)..  Is there a way to 
prevent this from happening?  Short of that, is there a way to prune my mail folders from within Evolution to 
remove duplicate (or triplicate) mails?

Thanks,
JP