[Kameron8]

Heart of Stone's effect states:

Item Effects
Charm effects caused to you and by you have no effect.

Players who are wearing this accessory and become affected by Charm will still have a Charm level % chance to dive in front of damage when adjacent to the inflictor. Note that the damage reduction portion of Charm is correctly ignored, so being inflicted with Charm will not lower how much you deal to the inflictor compared to normal.

To replicate:

1. Equip a Heart of Stone.
   
2. Have another player inflict Charm on you.
   
3. Stand next to the individual who Charmed you.
   
4. Swing at the inflictor on a different character, and witness the occasional martyr dive in front of the attack by the person who should be ignoring all effects of Charm.
   

[Neus]

This has been corrected.