I'm not trippin' Running PB1 and PB2 with no problem. Just installed PB3 on a MBPr 13-inch. Installation completed. Computer restarted. It hung on a dark grey screen for a while. Then tried to boot into Windows! This didn't work so I got the Windows blue screen of death. About six months ago I had Windows on the MBP with bootcamp. But I deleted it. Formatted and erased the HD through Disk Utility, and have since had Mavericks, PB1, and PB2 on. Ideas? Especially how to get rid of the remnants of Windows MBR that is still there. This has to be something to do with the Recovery disk update on PB3.