Running 18.104.22.168 on a Windows 7 Professional SP1 x64 system, with Outlook 2010 (32 bit version). I can't download any email with an attachment more than about 1MB - outlook just times out with an error. Shutting down protection lets me download everything. Guys, with problems like this I think you should have kept the Beta label on this for some time. Not good enough for a major release, this is a fundamental problem.