I just came across parts/3660.dat and noticed that the stud rotation is incorrect.
The part needs both studs to be rotated 90 degrees clockwise, so on the following picture ...
3660.png (Size: 6.72 KB / Downloads: 585)
... the 'LEGO' logo would be upside down.
The part needs both studs to be rotated 90 degrees clockwise, so on the following picture ...

... the 'LEGO' logo would be upside down.