karmapos.gif and karmaneg.gif are not found when you are viewing the AP level of a post of your own. (In other words, clicking on the Antipoints link on a post that is yours.)
Furthermore, the four different AP 'gem' colors are a bit awkward. The bright red can't be distinguished well from the dark red, same for the greens. I believe these are all in 'circulation' so to speak... I think they could be made a bit easier to distinguish.