The Hunter-Spell "Aspect of the Beast" seems to be buggy
http://www.wowhead.com/spell=13161
Although you should be untrackable you can be easily seen on the minimap with skills like "Track Humanoids"
http://www.wowhead.com/spell=19883
So it seems that Aura::HandleAuraUntrackable (SpellAuras.cpp) has no effect atm
Another idea is, that we must code something like an iterator in "Track Humanoids" and send only this data to the minimap
Perhaps somebody has a working fix for that, since mine had no ingame effect
Best Wishes
Biodiesel