Just in a game playing as Vi, was in top Lane chasing Amumu who had just started running away from lane into the jungle via the gap just before reaching the first tower out of base.

I charged Q and shot slightly through the wall. On my screen I shot through the wall and seemed to hit Amumu (show the hit animation) and then was placed back where I was when I released the charge..

I then copped abuse from people saying the norm "so bad" etc.. so it sounds like on their screens I didn't cross the wall? So not sure if Q is meant to be able to go through terrain or not but on my screen it did and on others I believe it did not.

I don't have a recording of this but here's a picture showing positions etc.

http://imageshack.us/photo/my-images/26/trmqy.jpg/