The Pathfinder Bleeding Critical feat has the following benefit:
Whenever you score a critical hit with a slashing or piercing weapon, your opponent takes 2d6 points of bleed damage (see Conditions) each round on his turn, in addition to the damage dealt by the critical hit. Bleed damage can be stopped by a DC 15 Heal skill check or through any magical healing. The effects of this feat stack.
When the feat says its effects stack, what does that mean? Does it mean the bleed damage stacks if a PC (w/ Bleeding Critical) crits a monster multiple times? Does it mean the bleed damage stacks with other abilities that cause bleed damage? Or does it simply mean that the effects of this feat can overlap with other 'critical' feats (Blinding Critical, Deafening Critical, etc...)?