This is not a serious bug, but just a bit puzzling. As I come towards the end of the main quest in Aquila, a couple of times a 'mouse fencer' pops up with some dialog (at least one of those times is early in Ithaca, but alas, I neglected to write down when). I assume this dialog is supposed to belong to Sarah Steele, though the words are spoken without her voice? Does not harm the story any, just rather... odd.