Found another possible issue. When killing tainted ones who are already in combat with vile one's my character never engaged the target. The log seems to say something about it not being a "valid hostile target". Manually selecting a vile one/tainted one with my mouse caused the character to then successfully attack. The same mobs who were "out of combat" were appropriately targeted/attacked automatically. ETA: I did try stopping and starting HB (closing the application also) with no effect.
Log pm'ed.
Also, I have been having an issue with something that is kind of frustrating, but I am not sure whether it is related to HB, or your profile. Even if "Train new skills" is unchecked my character will occasionally drop everything, and start traveling to Stormwind (the only available shaman trainer). I would obviously prefer to build up several levels of training before doing this. The only line I saw in your profile setting Trainnewskill=true was many levels of questing ago, *shrug*.