If you zoomed in to a cliff edge in earlier betas, the camera would move forward if you kept zooming, and when it cleared the edge zoom closer to the water/ground below the cliff. That was just zooming, not panning the camera. That behaviour (whether intentional or not) was changed so zooming in or out does not move the camera forward or back at the extreme limit, if you keep trying to zoom.
The camera always did automatically move up if you panned close to a mountain, etc.
