One further quick update: I noticed on a YouTube stream that no missions were available. Turns out that due to a subtle memory usage change, none of the missions were getting loaded and therefore the AI never chose any missions for the player to do.
Restart your steam client to force it to grab the new build, and you should get some missions to complete!
I'm also aware of an occasional crash loading saved games on Windows which I'll figure out first thing in the morning.
Until next time,
Chris