Some plugin "Hooks" cause exceptions

[TISNF]

Please forgive me for my lack of knowledge in how the plugin system works but when using some plugins that call simple hooks result in some errors:

Some examples:

Example 1 (SpawnMob):

2013-08-05 14:20:33 [SEVERE] Exception while calling plugin function in 'class SpawnMobListener' while calling hook: 'ATTACK'.
java.lang.ClassCastException

2013-08-05 14:30:26 [SEVERE] Throwable while calling plugin (Outdated?)
java.lang.StackOverflowError
    at PluginListener.onAttack(PluginListener.java:768)
    at PluginListener.onAttack(PluginListener.java:768)
    at PluginListener.onAttack(PluginListener.java:768)
    at PluginListener.onAttack(PluginListener.java:768)
    at PluginListener.onAttack(PluginListener.java:768)
    at PluginListener.onAttack(PluginListener.java:768)
-- this got spammed a ton in a short while --

Example 2 (Realms):

013-08-05 15:39:24 [SEVERE] Exception while calling plugin function in 'class Realms_CanaryClassicListener' while calling hook: 'MOB_TARGET'.
java.lang.ClassCastException

013-08-05 15:41:07 [SEVERE] Exception while calling plugin function in 'class Realms_CanaryClassicListener' while calling hook: 'POTION_EFFECT'.
java.lang.ClassCastException: Player cannot be cast to LivingEntity
    at PluginLoader.callHook(PluginLoader.java:1282)
    at OEntityLivingBase.c(OEntityLivingBase.java:482)
    at OEntityWitherSkull.a(SourceFile:78)
    at OEntityFireball.l_(OEntityFireball.java:122)
    at OWorld.a(OWorld.java:1247)
    at OWorldServer.a(OWorldServer.java:469)
    at OWorld.g(OWorld.java:1228)
    at OWorld.h(OWorld.java:1129)
    at OWorldServer.h(OWorldServer.java:345)
    at OMinecraftServer.t(OMinecraftServer.java:463)
    at ODedicatedServer.t(SourceFile:262)
    at OMinecraftServer.s(OMinecraftServer.java:392)
    at OMinecraftServer.run(OMinecraftServer.java:331)
    at OThreadMinecraftServer.run(SourceFile:582)

These are known working plugins.

[14mRh4X0r]

Thanks for pointing it out. Will be fixed shortly.