I closed up the windows yesterday but, every time I tried, the driver's side went up then dropped down a couple of inches like someone's arm was in it. Nothing in the manual so I phoned my garage, IGS. Turns out the window had 'forgotten' its height and was dropping down as, when it reached the top, it was expected to go further and saw the frame as an obstruction. Remedy - keep tapping the window switch up 'til it reaches the top, then hold the switch up for about 10 seconds. Fixed.