Using AC 1.40 and tried to complete the "Title Menu Screen" tutorial. When running the scene the entire screen went black. This didn't happen when creating the same "Title Menu Screen" in 1.39c.
Seems to have something to do with the "Pause Game when Enabled" checkbox. When you deselect that option, the menu appears, but the cursor is locked to the middle of the screen.
Comments
Shouldn't affect the cursor, though. Have you turned on Lock cursor in screen's centre when game begins? in the Settings Manager?