We're in early testing, but the profile feature of writable volumes broke when we went from 2.6 to 2.7. Writable volume alone appears to be fine. Known? We also have breakage in adding tasks by group policy in both 2.6 and 2.7. Event logs claim the task existed. Usually, task manager itself claims corruption. This does not occur with writable volumes without profile.
Environment: no appstacks in these tests, Win7 64-bit desktops, ESXi 5.5, vcenter 5.5, View 6. Tested with and without broker integration, with and without mounts at ESXi.