Initially my setting was "MouseWarpOverride"="disable". Mouse worked correctly when game initially started up and I was able to select the "Load a Saved Game" option off the main menu. Once the list of saved games screen appeared, the mouse cursor became uncontrollable. The cursor appeared to jump around the outer 1/4 of the screen (which seems strange -- I presumed mouse warp is supposed to clip the cursor in the center of the screen).
