I have a 12-core 2.93 GHz Mid-2010 Mac Pro with 5870 connected to a 30-inch apple display via the DVI port. Everything works fine except that when the Mac Pro is shut off, the monitor stays powered on. This clearly didn't occur with my older 2006 era Mac Pro, where on shutdown the 30" ACD shutoff. If I power cycle the monitor (pull the AC plug), after the Mac is shutdown, the monitor stays off. Also if I push the monitor's power button twice after the Mac is shutdown the monitor decides to give up and shuts off. Anyone else have this problem? Know of a solution?