North & South may have speed issues

[limi]

From the forums:

Everything works great so far but I discovered a problem with the game North & South.
During train or fortress scenes there's a timing problem. Gameplay runs much too fast and makes game unplayable.
I tried the force PAL option but that makes no difference.
I can get the game to work in normal speed by exiting to workbench, switch video mode to PAL from right-click menu, start MegaAGS and then North&South. Game is running in normal speed - even in train or fortress scenes.
BUT when doing so the mouse cursor is moving automatically in one of the corners even if d-pad is not pressed.