In addition to the ortho function no longer being available in selection commands like CP (crossing poly) or fence, I have discovered 2 more issues:
1. Match Properties cannot be carried between multiple drawing files. In previous releases I would be able to match properties from an entity in one drawing and then toggle between all open drawings and apply that property to entities in each drawing. I can no longer do this reliably.
2. As I toggle between open drawing files using CTRL-TAB and perform a command, say MOVE, I cannot move onto the next drawing unless I move my mouse after the completing the MOVE command.