I have had my 13" rMBP (refurb) for a couple of weeks now and while I LOVE it, occasionally when I wake it from sleep, the menu bar is black with "hints" of the items. (I'll get a pic up in a minute.) It seems to randomly go back to normal -- my current blackout has lasted about 2-3 hours now. I ran the hardware test with no ill results. I can't seem to find anything about this as a known issue. Any ideas on what is going on?