Wait, what? Which other games have this, because I haven't heard of this issue - and given that Intel has a huge chunk of the CPU marketshare, releasing games that don't work with their stuff is really kinda shooting yourself in the foot o.O
EDIT: Was it always left click to open doors, right click to move? Coulda sworn it used to be the same button (right). Took me a good three minutes or so to open the first door >.<