Bukkit

+ Likely fixed NullPointerException when MobArena plugin shuts down
+ Removed fight.selfhit check, as it causes problems all over the place with other plugins and isn't that security relevant anymore
+ Don't check BlockBreakEvents that can't come from a player (therefore have to come from a plugin), fixes compatibility with "LumberJack" plugin and probably a few others that I don't even know of
+ Reduced maximum movement speed a little bit by removing/nerfing a workaround for bunnyhopping
+ Support commandbooks "rocket" command, precious stones etc. stuff that launches players very high in the air better than before

- none that I am aware of