Bukkit

• Block list changes
• Configuration structure change
• Permissions change
• Removed configuration helper
• Removed GUI
• Removed internal logger
• Removed world-blocking support (if you want this, use a multi-world plugin)
• Added option to enable the /gm command
• Changed notification system to be a lot less spammy
• /reload safe
• /as rl now works correctly
• Updated SQL handling to be safer
• Added a storage converter
• Added the AntiShare tool, an item used to determine if a block is creative, survival, or "natural"
• Implemented a smaller and more effective inventory system
• Fixed A LOT of inventory bugs (such as random deletion, roll back, not saving, etc)
• Modified inventory mirror ability, now allows editing and live viewing
• Removed a piston exploit
• Removed conflicts handler (no need for it now)
• Added options to ban picked-up items
• World split added
• Fixed block drops
• Fixed regions 'moving' around the world
• Implemented a smaller API. Now it only does regions.
• General bug fixes

The plugin may not work correctly with other anti-grief plugins such as Burning Creative Suite and Essentials-Protect if not configured right.