Received notification this morning that Windows Mail had an update for my ATT locked 950 (in Vegas, USA).....downloaded the update, checked the build number & it's the new 17.6769.40722.0 build mentioned here on the site a week or so ago. So far, all emails are sized correctly (yeah!) and it does seem a bit faster in opening mail & moving between tasks. Glad it's one more thing fixed on W10....