Bukkit

0.4 Fixed:

• Tidied up sourcecode
  
• Optimisation when not dealing with leniency
  
• Fixed a critical/rare bug with leniency
  
• Figured out github, source now available there.

0.3 Fixed:

• Some weird error fixed (Involves strange reference comparison :S)
  
• Added new values to config
  
• Optional 'lenient' setting added.

0.2: Fixed:

• False triggering if there is another of the same type of block as the one you interacted with in the way
  
• No longer triggers through doors
  
• Left clicks are now protected too, as well as right clicks. (For levers, wooden doors, buttons)

0.1: Initial release

Formations like:
Chest, Block, Chest
Still cause issues even with leniency enabled. (Only if you move too fast)