It's not a big deal, but it seems the heat bar sometimes blocks the close button of the battle report window at the end of a run, meaning you're stuck with it until time runs out or you use the options menus to go away.

http://imageshack.us/photo/my-images/210/spiral20120409120801.png/

The wierd thing is I didnt notice this before. The heat bar used to dissapear before that window.