So I'm unable to end my turn.  I have an army of three heroes that are on route to a destination, along a road.  They still have 1 movement point left and there is nothing blocking their path.  If I try to change their destination, nothing happens.  They are animated as if moving, but standing still.  The army in question is in the picture below, as is their destination square.  Giving them the guard command, did cancel their movement.  

Here is a save game at this point.   Unfortunately, reloading the game fixes the problem but maybe you'll see something useful anyway.

Edit:  Looking at the situation after I reloaded the game, which fixed the problem, the army is actually out of movement in the square they are stuck on, the game just did not register it when they got stuck.  To clarify, they were stuck in the pictured location with 1 movement left.  However on reload, they were in that same square, not moving or stuck, but out of movement and waiting for me to end my turn.