2013-03-19 19:11:30 [SEVERE] Could not pass event PlayerMoveEvent to NoCheatPlus v3.8.12-RC2-b472
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:342)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:26)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
	at net.minecraft.server.PlayerConnection.a(PlayerConnection.java:222)
	at net.minecraft.server.Packet10Flying.handle(SourceFile:136)
	at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:180)
	at net.minecraft.server.PlayerConnection.d(PlayerConnection.java:115)
	at net.minecraft.server.ServerConnection.b(SourceFile:35)
	at org.spigotmc.netty.NettyServerConnection.b(NettyServerConnection.java:66)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:588)
	at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:229)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:476)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NoSuchMethodError: net.minecraft.server.Block.A()D
	at fr.neatmonster.nocheatplus.compat.cb2511.BlockCacheCB2511.fetchBounds(BlockCacheCB2511.java:56)
	at fr.neatmonster.nocheatplus.utilities.BlockCache.getBounds(BlockCache.java:143)
	at fr.neatmonster.nocheatplus.utilities.PlayerLocation.isOnGround(PlayerLocation.java:457)
	at fr.neatmonster.nocheatplus.checks.moving.SurvivalFly.check(SurvivalFly.java:88)
	at fr.neatmonster.nocheatplus.checks.moving.MovingListener.onPlayerMove(MovingListener.java:618)
	at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:340)
	... 15 more