It has happened a couple of times and it just happened again two minutes ago.
I have it on, there's battery (45%), the power adaptor is not connected and I'm not touching it.
Suddenly, for no apparent reason, it turns off!
No, it doesn't go into sleeping mode, it simply dies on me! Everything's dead!
The only way I seem to get it working again is by pressing the power button, which makes it start as if I had turned it off normally before that. Needless to say, all the windows I had open are now lost into oblivion.
What the hell is going on?? Is this thing broken??