Bukkit

v2.31

• added automatic updater
• added plugin metrics to track usage

v2.3

• changed to use head and feet trails
• head trails fire every 5 ticks
• feet trails fire on move
• mob trail does something special when used as head trail
• cleaned up code
• minor performance improvements
• saving of current trail after login/logout and restart
• added option to turn off saving of trail

If you specify an improper mob, it will throw a NullPointerException in the console. We're working on a fix.