Mail POP sill start pulling down emails, then stop

Question

I have been killing myself on this quirky malfunction.
using mac mail that for months worked fine it now starts to pull emails down from the server, after about 20 messages you see the kb/m drop to zero and it just stops. I can click around and change settings if i want, i can read other emails. but the program is in a "partial hang" it won't sent emails and it won't finish POP-ing the rest of the messages. and it won't quit. i have to force quit.
if i open mac mail and send a message it works fine. so long as i don't "get new mail"
i have done the following things to try to resolve the issue.
-re-install from leopard disc
-delete com.mail.plist file
-delete accounts and re create
-rebuild database for the inbox
-deleted recent emails from the server and the client side
in testing with another machine i can pop fine
on yet another machine i can imap just fine as well.
what else can i do. please help. my auntie's small business is depending on me to fix this ASAP
thanks in advance

Answer 1

i received help on another thread about this problem. here it is:
quit Mail and delete the file home directory/library/mail/MessageUidsAlreadyDownloaded3. then start mail and try downloading your pop messages again. note that this will cause mail to redownload ALL POP messages. so if you don't want doubles you may want to make a local mailbox in "on my mac" section and move the contents of your POP inbox there first before trying the above.
It worked perfectly for me.
give it a try and let everybody know if it worked for you too.