I have had an issue with HerbtrackerFu. Sometimes (not all the time), the little purple circles will follow me. No, I'm not drunk. hehe. Seriously, when I am running around and come near a herb I've picked before and it turns to a purple circle, sometimes they don't stay put and start following me and soon I may have six or seven purple circles in my minimap just staying in place.
A reloadui fixes the problem right up. But just thought I'd post an FYI.