How were you trying to pan the screen, that wasn't working?
It worked during the early access period by moving the mouse cursor to the edges of the screen. Vertically/horizontally.
After the "final" it only works in a random fashion - I can pan either left or right, up or down with no way to pan back.
A,S,D,W is working, but not as smooth as the mouse panning had been.
Makes a difference if I try to "scan ahead" for possible nasties.