I'm using PD8 with a Windows 8 guest, as well as with a Windows 7 guest. In Windows 7, when I switch to Coherence mode, I can use Cmd+Tab to switch among all the open windows of Mac OS as well as all the open windows of the Windows 7 guest. Not so with the Windows 8 guest - pressing Cmd+Tab simply shows all of the windows of the guest as a single window. I have to switch to that single window first, and then press Alt-Tab to switch between the windows of the guest. Note that I am only running one of these guests at a time: either Windows 7 or Windows 8. I am just providing the Windows 7 results for comparison. Does anyone know if there's some new setting I need to toggle in order to get it working like it did in Windows 7?