One of my dual 1.42 MDD has this problem, which I believe is not uncommon. It runs just fine, good enough actually that is is my favourite MDD of the 4 that I own. The problem is that every time I shut it down I have to remove the power plug for a few minutes before it will restart. I'm aware that I'm resetting the SMC or PMC whatever when I'm doing this and not sure how long this can go on. I've actually installed an inline power switch in the power cord to save the wear and tear on the power plug, this works just fine but I'd still like to correct the fault that is causing this issue. Does anyone have any suggestions?