I have a 8400 GS. Tired updating the drivers and DirectX and all that jazz?
Tried the latest drivers, rolled back to the previous drivers, and now I am currently using the beta drivers. None of which fix the problem.
Also, it seems, at least for me, that the power of 2 rule doesn't hold true. 2x2, 4x4, etc. still scramble the graphics up until I hit 16x16, then the rule applies.
Very strange. Maybe it will get fixed, considering this is happening with modern nVidia cards in the past 2 build cycles, and could eventually make Construct worthless to people with current gaming rigs.