I am finding in 1.1 (and I think this might have been a problem in Frogboy's build as well) that tile selection has gotten a little wonky.  This leads to weird outcomes like I click on one tile to move a unit, but the game registers my click as being on the top of a mountain (or other inaccessible spot).  Given an unreachable destination, the pathfinding appears to go insane and sends my units off in random directions to destinations in the FoW.

This seems especially noticeable when there is a mountain on the screen near where I am trying to send my units, like if there's a mountain below or to the right of my destination.  Though I can't be sure that it happens exclusively with mountains.