Major problems with hibernate and IMAP4. An expunge command only happens on closing and the connection goes away when hibernating. You really need to at least close the IMAP4 connection before hibernating. Personally I'd completely close Pegasus Mail if i were to be gone for awhile.
FWIW, how long does it take to open WinPMail? Opening a IMAP4 connection when you are getting status for all the subscribed folders rather than just the new mail folder on connection can take a long time.
Thomas R. Stephenson
Member of Pegasus Mail Support Team