Camera will not rotate around anything (User preferences->Rotate around selection on)

My camera in the view-port will not rotate or move, I can not rotate around my objects, and sometimes the grid will move too. I didn't save my blender file in this way before I closed my project, but it so happens to be in the state on opening. When I right click the grid moves in object mode, even in quad view I cant drag the objects view. Zoom in and out works. Middle mouse button does not work. I have tried:


It's like this for a new blend file too
view lock to object, lock camera view [x] &amp; [ ]
shiftnum&amp; altnum
shiftaltctrlc
shiftc
Space->clear lock view (doesn't appear)
User preferences rotate around selection needs to be ticked.