WORLDGUARD-2626 - Reported by xTimeBomBx

Randomly happens. I updated to most recent. 1.5

16.03 16:36:31 [Server] INFO ... 36 more
16.03 16:36:31 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
16.03 16:36:31 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70)
16.03 16:36:31 [Server] INFO Caused by: java.lang.ClassNotFoundException: org.bukkit.entity.MinecartTNT
16.03 16:36:31 [Server] INFO ... 30 more
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
16.03 16:36:31 [Server] INFO at java.lang.reflect.Method.invoke(Method.java:601)
16.03 16:36:31 [Server] INFO at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
16.03 16:36:31 [Server] INFO at sun.reflect.GeneratedMethodAccessor391.invoke(Unknown Source)
16.03 16:36:31 [Server] INFO at com.sk89q.worldguard.bukkit.WorldGuardEntityListener.onEntityDamage(WorldGuardEntityListener.java:432)
16.03 16:36:31 [Server] INFO at com.sk89q.worldguard.bukkit.WorldGuardEntityListener.onEntityDamageByEntity(WorldGuardEntityListener.java:277)
16.03 16:36:31 [Server] INFO Caused by: java.lang.NoClassDefFoundError: org/bukkit/entity/MinecartTNT
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.ThreadServerApplication.run(SourceFile:573)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.MinecraftServer.run(MinecraftServer.java:409)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.MinecraftServer.q(MinecraftServer.java:476)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.DedicatedServer.r(DedicatedServer.java:225)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.MinecraftServer.r(MinecraftServer.java:562)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.WorldServer.tickEntities(WorldServer.java:462)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.World.tickEntities(World.java:1225)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.World.playerJoinedWorld(World.java:1337)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.WorldServer.entityJoinedWorld(WorldServer.java:596)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.World.entityJoinedWorld(World.java:1356)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityZombie.l_(EntityZombie.java:125)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityMonster.l_(EntityMonster.java:24)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityLiving.l_(EntityLiving.java:541)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityZombie.c(EntityZombie.java:112)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityMonster.c(EntityMonster.java:20)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityLiving.c(EntityLiving.java:1309)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityLiving.bo(EntityLiving.java:1512)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.PathfinderGoalSelector.a(PathfinderGoalSelector.java:104)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.PathfinderGoalMeleeAttack.e(PathfinderGoalMeleeAttack.java:83)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityZombie.m(EntityZombie.java:129)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityMonster.m(EntityMonster.java:88)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityPlayer.damageEntity(EntityPlayer.java:349)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityHuman.damageEntity(EntityHuman.java:683)
16.03 16:36:31 [Server] INFO at net.minecraft.server.v1_5_R1.EntityLiving.damageEntity(EntityLiving.java:693)
16.03 16:36:31 [Server] INFO at org.bukkit.craftbukkit.v1_5_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:391)
16.03 16:36:31 [Server] INFO at org.bukkit.craftbukkit.v1_5_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:369)
16.03 16:36:31 [Server] INFO at org.bukkit.craftbukkit.v1_5_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:81)
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
16.03 16:36:31 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
16.03 16:36:31 [Server] INFO org.bukkit.event.EventException
16.03 16:36:31 [Server] SEVERE Could not pass event EntityDamageByEntityEvent to WorldGuard v5.7.2