did vw strip your gearbox or did they just take the car for a test drive?
if its the same problem as mine, a test run (unless its for well over 30mins) wouldn't necessarily show anything wrong.
i described the fault to my local dealer over the phone who seemed to think it was the synchromesh, which would mean a taking the gearbox apart and replacing the offending piece. they also mentioned the selectors could be at fault (another gearbox strip to resolve).
either way its a bit of sphincter twitch when you look at the cost involved
