I notice that my fork is squeezed together when I tighten the quick release mechanism. Is it possible then to over torque the quick release and squeeze the fork too close together?
Unless you're standing on it, probably not, especially if its an external/exposed cam style quick release
I'm assuming what you're seeing is just the legs coming in a little bit as the spacing is slightly wider than 100mm. As long as it's just a couple of mm, I woudn't worry about it.