My last car, a 1.4 CL, did it at 80. Basically sounded like the door vibrating. mind you it was hard pressed to do 80, let alone anything more

Pulling the top of the door in by hand stopped the noise.
Current car is a 16v GTI fine at all speeds, though the wipers kinda jump a bit at very high speed, as if somebodys pulling them up. Also very ineffective at 85+, maybe thats what a wiper spoiler is for!