What I have found is that the emoticon that replaces your normal emoticons starts with emoticon_ and then the letter coresponding with the emoticon. It comes up because I suppose Graal just looks for the first file in your emoticon folder that starts with emoticon_ and then the letter you pressed. The emoticon in question was emoticon_goodspar.mng, or something along the lines of that, and, alphabetically, came before emoticon_Grr.png, which was the defualt emoticon. So, if you delete that file, it will remedy the problem.
