Ohh soo much fun....it was in service for a week. I got it back with basically the whole display window and frame replaced...(so they basically confirmed a warranty-covered hardware problem) and it worked...well...for half a day. ;-)

It's got two different issues now...
1) The touch screen often seems to miss the fact that i released the finger. It sometimes get's it 'ages later'. Bloody annoying...about as useful as it not working at all.

2) I seem to have never gotten the keyboard backlight activating in the dark ever since i got it back from service.

Due to some really strange behaviour of the touch screen i'm still wondering if this is a software issue or if it has to go back to the service again. However, it looks more and more like the latter.

What puzzles me the most is that both times (the first time where it stopped working almost completely and now after service) the malfunction started occurring around times where the phone ran out of charge and i powered it up again.

Bloody annoying.