Okay, here's a weird one.  My sovereign attempts to attack an enemy city and nothing happens.  It gets worse.  After the city battle fails to initiate, none of my units can move even though they have movement points left.  I also can not advance to the next turn.  I can do just about anything else except move and end turn.  This persists even after exiting fully from the game and reloading.  I have including links to the debug.err and a saved game.  The debug file states the battle window failed to unhide, so the battle was cancelled.

To reproduce find my sovereign "Brian" and attack the city Caldesbern.  After attempting to attack the city, no battle will happen, and the game is effectively hung at that turn.  My work around is just to not attack that city.  Now that I think about it.  This may be a very effective strategy implemented by Kraxis.  

https://www.dropbox.com/s/yjgps7if2nojiep/Movement%20debug.err

https://www.dropbox.com/s/d2n372sg63691jk/Caldesbern.EleSav