Bukkit

Now command rewards can have a chance of being executed.
(This is currently avaiable for individual blocks in blocks.yml, blockgroups are not affected by this update - this will come later)

Example:

POLISHED_DIORITE:
  Money: '1.0'
  XP: 1;2
  Commands:
    '1':
      Command: 'msg <player> test'
      Chance: 50.0 # 50% chance

All commands without "Chance: " key have by default 100% chance.