Thanks for the quick reply, it's not quite it though. I guess I'd want something like Swap3DPanAndZoom. Actually, the Swap Pan and Zoom option in the UI is exactly what I want, toggled off the ortho views work as I'd like, toggled on the 3D view does.

I just remembered that I had been playing with the v3 beta, perhaps that led to the problems with v2.52? I'll see if I can get something repeatable.