I am experiencing a glitch with mail after PR1.3 update. I have 3 IMAP accounts - 2xGMail and 1xOther, all of them set to "always up to date".
Regularly some of these accounts stop updating. Never happened before. It can be that at the same time one of the GMails is updating OK, when the other is failing without any error message displayed. I notice this when I check update status/time of accounts. When I manually update the "stalled" account there are new messages in it. It is solved, by deactivating the problematic acc., and then activating it. For several hours everything is OK, until this happens again.
Still have not deleted and recreated the accounts anew.

EDIT: After enabling PSM and then disabling it, accounts do not auto update.