Interestingly, mine works fine with or without compatibility mode, except printing. When I want to print I need to put it in capability mode or I get an error when opening a paper space tab. (I normally operate NOT in compatibility mode because I use AutoHotkey for some helper macros while drawing, and autohotkey does not seem to function when AutoCAD is run in compatibility mode. Probably more information than needed, but that is why I use both modes.)