Allowed my iMac with 10.8.2 to sleep with several apps running. This morning I wake it and I see my Mail.app icon is missing from the dock and Mail has been closed/quit. I reopen and have to set it to remain in dock again. Anyone else see this happening? Also been having other misc buggyness and seems to coincide with me starting to use Mission Control. Which leads me to another question ... should MC remember which apps are assigned to which desktop after a restart?