Is anyone else having problems using Windows Mail client with Win 10 preview? For the last couple days, I haven't been able to open the Windows mail client. When I open it, it starts then immediately minimizes to the task bar. Once that happens, I can't open it at all. Each time I try to maximize it, it pops open for a couple seconds then shuts right back down to the task bar. Anyone else seeing this? <edit> It is also happening with People and Calendar.