Dispeners Crashing Server with error then no one can login

Issue with rev82 carftbukkit possible the bukkit API as well not sure.

Redstone powerd Dispenser crashes server errors when rapid fire of anything that is put into the despenser.

PHP:

2011-01-19 05:10:14 [SEVERE] Unexpected exception
java.lang.NullPointerException
    at net.minecraft.server.EntitySnowball.b_(EntitySnowball.java:180)
    at net.minecraft.server.World.a(SourceFile:1116)
    at net.minecraft.server.WorldServer.a(WorldServer.java:41)
    at net.minecraft.server.World.f(SourceFile:1092)
    at net.minecraft.server.World.c(SourceFile:1071)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:260)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:197)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)

PHP:

[SEVERE] Unexpected exception
java.lang.NullPointerException
    at net.minecraft.server.EntityEgg.b_(EntityEgg.java:184)
    at net.minecraft.server.World.a(SourceFile:1116)
    at net.minecraft.server.WorldServer.a(WorldServer.java:41)
    at net.minecraft.server.World.f(SourceFile:1092)
    at net.minecraft.server.World.c(SourceFile:1071)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:260)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:197)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)

These Errors seem to appear when they get shot out despensers I assume it does this with any item u put in there to shoot out. pinpointed this as the cause to the crash as well as I host the server locally and was connecting locally and it timed out until I rebooted the server.

 

when that happened, only me and led were on that server, i attached a pulser to the dispenser, at the first time i filled dispenser with eggs, dispenser fired slowly, so i placed a redstone torch beside the dispenser, and it crashed. the second time, i filled dispenser with snowballs, i waited longer and placed a redstone torch near dispenser again, causing it to go rapid fire, then after a minute it crashed again. when it crashes, you seem to lose connection to server, and when you try to relog in, you either get "took too long to log in" "timed out" or manange to log in, but fter a few seconds you "timed out" again.

also more problems with our server:

typing anything with a "/" first, causes 1 heart damage, no matter if its a known command or not.

 

Yea for some reason using commands causes 1 hearts worth of dmg. as it shakes the player a little!

 

A friend set up a red torch dispenser system that fired arrows, when you pulled a lever. If a creeper got hit the server crashed. Is this due to bukkit or part of Notch's coding?