I will take a look at this as well, i'm currently a bit limited for a few days in what kind of fixes that I can make.Yes, I always press Update Resolution, but in 1440x900 (16:10) the glitch is present in both fullscreen and windowed mode. I also tried to play in 1336x768 (~ same aspect ratio of my monitor) and I have no problems.
PS. I tried to change resolution and restart the game but it doesn't solve the problem.
I already mended the code that caused the progress issues, its related to either if you jump back too far or if you load a game after playing a game. Only way right now to load twice without breaking is to restart the game as it wipes the progress in the memory. That fix should be coming out tonight, with some other tweaks. I will take a look at the wimp path etc.