Orca is extremely broken

[Nolan Darilek]

This is such an odd problem and I don't know what caused it or how to 
solve it.

I put away my laptop in the morning, literally just woke it up in the 
evening, and the Orca key doesn't work. No Orca commands (t for time, 
review, etc.) do anything. Caps lock isn't treated like it would be 
without Orca filtering it out, but it does not do any of the Orca commands.

I removed my Orca configuration and reset back to defaults. Insert 
exhibits the same behavior. That is, it doesn't trigger the Orca keys.

Additionally, I can no longer arrow through web content. I can only tab. 
Carrot browsing has no effect on this.

I also lost access to the Unity launcher. Switching to the GNOME session 
has no effect.

I know it sounds like I did something, but all I did was put this thing 
to sleep. I did wake it up and apply all updates, but nothing makes a 
difference.

How do I debug this?

I get that accessibility of 12.10 isn't guaranteed, but it seems silly 
that it should work fine, then break utterly with no apparent cause.

Thanks.