Bukkit

 Changes in version 5.1:

• New: implemented ActionBarNotify parameter to notify other connected players using action bars when an achievement is received, instead of the previous chat messages. The ChatNotify parameter no longer has any effect and is replaced by NotifyOtherPlayers.

• Improvement: redesigned the /aach reload command, which should now be significantly more reliable and easier to maintain.
• Improvement: removed disabled categories from tab auto-completions.
• Improvement: enhanced performance.

• Fix: fixed empty or water bottle abuses with Brewing achievements.
• Fix: several other minor fixes to improve the overall experience.