I thought I had been spared.. I thought I was lucky as usual.
But it seems I wasn’t this time. My MacBook has RSS :(
(Random Shutdown Syndrome)

It is sent now away to get a new Mainboard and a new heatsink… 8 working days. Apple apparently expects a _LOT_ of units being replaced the next months.
At least they don’t make a fuzz about it and just take it in for replacement.

Now that I had the Mac OS X Experience for more than 2 months and all of a sudden am back with Ubuntu Linux on my old 400Mhz VAIO I know that once the warranty of the macbook is over I will run ubuntu on it ;)