In 1.8 experimental, doors (both driver and passenger) on the US truck cab now move geometry that shouldn't move with the door. This wasn't an issue in 1.7 and before. Presumably the issue was introduced when the model was reskinned to allow for rotating driveshafts.

Here are 2 photos from 1.8 experimental and 1.7 stable

^ 1.8.0.5

^ 1.7.0.54