Oh!! Huh... I hadn't noticed it, but you're right. I think.. Let's see if it works on this post.
EDIT: Didn't work.. maybe it's just a glitch on the last.fm side? They might be restructuring the way those are displayed or... i really don't know.
EDIT 2: I checked my sig and the code isn't even there! On the hand, I don't post very often and I can't remember if I deleted it from my sig myself. I don't know why I'd do that, but I .... must have?