So I am continuing to have problems with the display upon waking my computer from sleep every ~3 mornings now. The screens will be blank (except for a mouse pointer and, this morning, an "updates available" notification in the top right)...sound will be coming out fine. I have to hard restart with the power button in order to be able to view anything. This has happened before...but today something completely unacceptable has happened. Upon this last restart, all of my keychain passwords and finder network favorites have completely disappeared! What on earth would cause that to happen? ...and has anyone else had this issue?