So my iMac has developed this awesome new feature. Two or three times a day it will decide to restart itself. There is no interruption in power and the speakers attached to the same outlet do not turn off, so it appears the problem is isolated to the computer itself. I am typically surfing when this happens, luckily no mission critical stuff has been lost. Anyone else with this issue? I should be expecting iMac #4 in a couple of weeks, so I suppose I'll just have to deal with it in the meantime.