My Mac Pro arrived today, and I've been playing around with it this evening. I was away from it for awhile, so I put it to sleep. When I returned, I clicked the mouse to wake it up. My desktop appeared for a second and then the screen (brand new 23" ACD) went black again. It then started flashing a solid blue screen every few seconds. The sleep light on the Mac Pro was solid (indicating not sleeping), but the display sleep light was pulsating. I had to do a hard shut down to get it back. When I had restarted, I tried sleeping the display by itself, and it woke up with no problems. Has anyone else experienced anything like this? Any suggestions?