I'm having some issues in After Effects, I've used the program for years but never come across this before. Basically, when I pick-whip layers together, the initial layer becomes skewed, where normally it would remain unchanged until the layer it is pick-whipped to is altered. This only began happening yesterday, so im guessing maybe a setting somewhere has changed, but i'm out of ideas.
Are you parenting to a layer that has some transformation already applied? There is some cases the skew is caused to compensate some math's that's going on prior to the parenting, usually with 3d rotation. (That's my guessing)
Usualy what I do is keyframe the transformations (to keep what I had) move a frame in time, zero them all out...parent the layer and then delete the keyframes.