Why do I keep hitting Grieving Mother after combat?

[lodril]

Since starting up White March Part 1, every now and then my barbarian just smacks Grieving Mother.  They're not standing near each other (or even close enough for a melee hit), there's no combat animation, and there doesn't seem to be any specific trigger that starts it, but so far it has always happened after everyone's recovered from combat.  The barbarian gives a battle cry or something and smacks her, she takes damage... sometimes she complains that I'm hitting her, then it's over.  It has, so far, always happened when I selected the entire group (dragging a box over them) and then told them to move somewhere after combat.  Just now I got a critical hit on the poor woman while strolling across a bridge in the Battery.

[Xaratas]

Please attach a savegame and an output log. See the stickies for the location of the files, use sendspace.com or some other online space to upload the files because the forum is quite limited in what it accepts.