@FabiaLP
It is actually the opposite -- I do not at all say or believe that there are no bugs in this engine. But it is quite ignorant to believe just because you pay 20EUR for a software you get something bug free. I don't think there is any complex software free of bugs. I am convinced that there are bugs in every single complex-scripted DLC. That's life!
The misconception here is to believe that when you pay for payware you pay for absence of bugs. No, you pay for somebody's work! On top of that I think the examples given were not really bugs as in wrong program behavior. They are glitches and "niggles" in the sound, complaints about the cold start, that is explicitily stated to be "not supported".
@Dallas,
if you want to discuss in this forum, it might be better to switch to German. And stop telling us to "Listen!" You are being rude.