Mail not counting unread messages properly

[waiting_for_OSX]

I have two Imap accounts, gmail and one other and often the Mail program does not properly count the number of messages that are left unread. Frequently I will read a message in the unified "inbox" and then the same message will still be left "unread" in the gmail inbox. I'm using Snow Leopard on a uMBP-17, however this problem has existed for years on my other MBP.

Does anyone else have this problem?

 

[eric2006]

Yes, is there any way to fix this? I also have an exchange account, and "read" messages are counted immediately. On Mail, junk mail and regular mail stay unread for a few minutes after being read.