In survival or adventure mode, one is damaged by jumping off of Cobblestone or Mossy Cobblestone fences, the damage value is around 1/2 of a heart.
MC-1205
Jumping off Cobblestone Fences causes damage
Closed
Duplicate
0
Elijah Rotholtz
(Unassigned)
Unconfirmed
cobblestone, damage, fence
Minecraft 1.4.2
Retrieved
Can you supply a screenshot of the setup? I tried with the one in this screenshot and couldn't reproduce.