Really need help...

The server was running perfectly fine, but then I tried to ride in a minecart and I got this error:

Code:

2011-06-20 08:45:33 [WARNING] Failed to handle packet: java.lang.NullPointerExce             ption
java.lang.NullPointerException
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:873)
        at net.minecraft.server.Packet7UseEntity.a(SourceFile:33)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:223)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:75)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:433)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:343)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-06-20 08:45:36 [WARNING] Task of 'Paid2Mine' generated an exception
java.lang.NullPointerException
        at me.pwnage.bukkit.paid2mine.iUpdate.run(Paid2Mine.java:170)
        at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(C             raftScheduler.java:137)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:420)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:343)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)

Then yesterday I was using some steps, I broke one and it didn't go back into the pile, so I moved my mouse over this odd step and got this error:

Code:

2011-06-20 09:05:47 [SEVERE] java.net.SocketException: Broken pipe
2011-06-20 09:05:47 [SEVERE]    at java.net.SocketOutputStream.socketWrite0(Nati             ve Method)
2011-06-20 09:05:47 [SEVERE]    at java.net.SocketOutputStream.socketWrite(Socke             tOutputStream.java:92)
2011-06-20 09:05:47 [SEVERE]    at java.net.SocketOutputStream.write(SocketOutpu             tStream.java:136)
2011-06-20 09:05:47 [SEVERE]    at java.io.BufferedOutputStream.flushBuffer(Buff             eredOutputStream.java:65)
2011-06-20 09:05:47 [SEVERE]    at java.io.BufferedOutputStream.flush(BufferedOu             tputStream.java:123)
2011-06-20 09:05:47 [SEVERE]    at java.io.DataOutputStream.flush(DataOutputStre             am.java:106)
2011-06-20 09:05:47 [SEVERE]    at net.minecraft.server.NetworkWriterThread.run(             SourceFile:116)

I've been having major problems with redstone as well, but I don't get any errors. The problem is that whenever I step on a preasure plate or push a button, it gets stuck in the on position and then takes awhile for it to go back into the off position. This is getting really annoying.

I have tried on Vanilla and I do not get the redstone problem or the step problem or the minecart problem. I know it's a plugin, I'll start updating all my plugins while I wait for a response.

My specs:

Code:

Linux minecraft 2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10 21:21:01 UTC 2011 i6                     86 GNU/Linux
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
Java HotSpot(TM) Server VM (build 17.0-b16, mixed mode)
I am running CraftBukkit b890
2.5 GB of ram

My plugins:

Code:

AutoMessage

Backup

BorderGuard

ChairCraft

CommandBook

CommandHelper

DelayedStop

FalseBook (all)

HelpPages

HeroicDeath

iChat

iConomy

iConomyChestShop

LogBlock

LWC

MineMail

MobileAdmin

MoveCraft

MultiHome

MultiInv

MultiVerse

MyWarp

NoCheat

Paid2Mine

Permissions

PermissionsPlus

PortalStick

Regios(I use this for regions)

Stargate

VanishNoPickup

WorldEdit

WorldGuard(Not using regions)

Need anything else, just ask!

Sorry to double post, but I really need help. Anyone?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.