I normally park Smaug inside with the windows down and only drive on sunny days. Imagine my surprise - when I went to raise the passenger window to park the car in a car park, it wouldn't go up! The mechanism is clearly going up and down easily (and fast), audibly reaching both stops. The window glass, however, stays put at the bottom. Do I have the dreaded "broken butterfly syndrome"? I feel a door teardown in my future.
Pointers and advise greatly appreciated.

