There were two bugs I caught in the 0.8.3 release:

- 'Shift+A - Add Mesh' & 'Right Mouse - Pan 2D View' - were not working in Blender, despite being present in the keymap

- and, the other, bigger, game breaking bug was that you would sometimes be unable to exit RightMouseNavigation, meaning that you would have to quit the program and restart to be able to navigate properly again!

Both of these bugs confused me for a while, but a random poster, who I will now have to track down and give credit to revealed that Blender will sometimes format its own keymap incorrectly on Export.

Sure enough, after opening the keymap in a text editor and manually formatting it, the bugs disappeared!