There is a new and improved version available!
Major new feature is debugging function which you can call each frame:
void hpf_debug(ENTITY* ent, var mode, COLOR* color);
This should help with debugging and isolating problems. There are some other features and more customizability so make sure you check the "hpf_pathfinding.h" configurable stuff area.
Download:
http://superku.de/HPF_v1.25.zip