The battle report screen has the HUD text showing up on top of it.  Not the button itself, just the text.

The unexplored area also seems to be failing to cover enemy units when they move.  I see the unit pop up and move in the fog of war area then disapear shortly after the turn starts for me.  Happens every turn.  It seems to be limited to units that I have already seen outside the fog of war (in normal viewable & explored areas).  The units appearing are showing up in unexpored areas w/ fog of war on them, not use if they show up in explored areas with fog of war on them.

I also encountered a similar problem where after returning from the main menu, which I opened from the options screen.  The soverign's gamepiece/icon stayed in one place on the map but was unselectable.  The sovereign himself wasn't being displayed but was elsewhere on the map (invisible, but selectable (and movable)).  It continued this way for a few turns, which brings me to my next error.... when I alt-tab back and forth sometimes the game fails to come back up leaving 2/3 of my screen blacked out until I force elemental to close using end now (I'll try to get a log for that next time).