Hi torsten, that might have something to do with the retina type display, where the OS tells some apps (like MoI) that the screen is actually 1/2 of its actual width and height, and then draws a stretched image. The libraries that MoI v3 and earlier are built with have some problems with that. That's another area that should get cleared up with MoI v4 as well.

For the app window movement glitches, do they go away once you actually finish moving the window?

- Michael