Get this error with 2.0.1 on both Ubuntu 12.04 x86_64 and Arch Linux x86_64.
The cursor won't update its position when typing or pressing arrow-keys. Clicking somewhere in the text with the mouse moves the cursor though, but that's it.
This is something that occur pretty much at random times in my experience, I bypass it by restarting ST, but that's pretty annoying after a while. I'm afraid I don't know how to provide any valuable debug regarding this though.
Is there something I can try to do to track down the error, perhaps even fix it?