MacBook Pro :: Horizontal Lines At Bootup (no Dock, No Icons, No Taskbar)?

Jun 17, 2012

Starting this morning, when I boot up my MBP, it seems fine through boot up, but when it reaches my desktop, the taskbar, dock and desktop icons never show up and instead I have horizontal lines across the screen.  I tried booting up from my external hard drive, but I have the same issue.  I can see the mouse and move it around and the desktop wallpaper shows up sometimes, but nothing else shows up.  When I boot up in safe mode however, everything looks fine. I have not upgraded anything anything recently, either hardware or software. 

Info:
Macbook Pro (Original), Mac OS X (10.6.4), AEBS, Apple TV

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