I've heard of some systems doing that once in a while but mine have always been ok I guess but really moving it is super bad. We were over at a friends house all playing games and a buddy moved the XBOX360 from laying down to standing up... you should have head the crunching sound that ensued. Cringe inducing...

I keep mine laying down too, stood in on its side for 3 days and decided I'd rather be safe than sorry. Interestingly enough I know a girl who left her PS2 on for a week and now it won't work in the laying down position.

when I shake my Xbox something rattles..It did this last time before I had it repaired, Im not sure if it did it while it was working or not..

What in the hell are you shaking it for :D I think that is normal as there is something in there that moves so it knows what position it is standing in, for the lights to light up.

it was already broken. I was showing it who was boss.:)