last night i was playing the first halo and got to a point where i had too much eye fatique to continue to play. i could not save my progress so i simply turned off my t.v., receiver and left my xbox on so i could continue to play when i woke up. well i woke up and to my horror the xbox was powered off. i quickly turned it on and became instantaneously furious. i had lost all of my progress. has anyone else had this happen to them? do xbox's turn themselves off? wtf!!!!