Bukkit

December 1st 2012:

• Added support for CB1.4.5
• Fixed issues if AssassinPack was installed as well
• Fixed bow strength issues (bow != charged giving full damage)
• Fixed other small bugs

October 29th 2012:

• Added support for CB1.4.2

October 20th 2012:

• Added cripping shots in lieu of nutshots
• Added headshot for regular PvP
• Dynamic damage for farther critical
• Added a probability for blocking
• Removed text-alert (with config option to re-enable it)
• Added particle effect for critical shots, and blocking
• Bug fixes and other random updates
• Fixed hit boxes

None that I know of.