@Sven Groot: I think you must be holding it wrong. You either have bad drivers or it's something that Microsoft will fix before release (you know RTM v2). In either case no worries.
This is why I dislike Agile/Scrum because you end up with software like Windows 8. The Product and Program managers have met their releases/deadlines, when the testers found bugs, it was put in the "will be fixed via Windows update queue".
I have been using it for little while as well, and boy is it buggy. This may have been mentioned before, but on two monitors, I keep missing the charms bar and going to my second screen. Maybe I need to move my main desktop to the right, but obviously the charms bar was very well thought out for people with two monitors and not a tablet.