I just installed Outlook 2013 RTM and connected it to my Gmail account via IMAP. Everything seems to work, except that occasionally when I switch from Mail to Calendar and back to Mail, all of messages disappear from my inbox and I can't get them back. When I then check the Gmail web interface they are all still there in the inbox, so the problem seems to be that Outlook 2013 just isn't displaying them any more. I have tried resetting the Outlook view settings, removing all filters from the view, exiting and restarting Outlook, erasing the Outlook profile and recreating it, but nothing works. The only thing I've found that works is removing the IMAP account altogether and recreating it--this brings back the messages but only for a while until they disappear again.
To me this appears to be a bug but I've been unable to find somewhere to report it. Microsoft Connect doesn't have Office 2013 listed, and there's no longer the smiley face within the program since it's the RTM version. I'm not sure where else to report Outlook 2013 bugs.
Anybody have any ideas?