Diego,
It sounds great that a new driver will be coming out to fix this problem, but I was wondering if there is a way that I could be notified when the new driver is out? I tried the Beta Win8 driver and that fixes the XBMC funky design patterns that cross the menu screen, but it does not play movies correctly, for me. With the Beta driver 1533b,I have a strange border on the left and upper edges of my screen. So I'm back to the original driver with funky patterns crossing the menu screen...but at least it play movies.
Thanks
Haswell i5-4670T, HD4600, Windows 7 64bit, XBMC12.2