Solved Entity.java:816?

I am running a 1.2.5-4.0 bukkit server on my 64bit windows 7 computer, and I am getting thousands of lines of "at net.minecraft.server.Entity.a(Entity.java:816)"
then after about 3,000 lines of this, it ways connection read timeout, and doesn't do anything.
This is the startup log: http://pastebin.com/zZGdSBmk
Any ideas?

 

Need to see the full error from your server log

 

It just has 3000 lines of that, but ok, here http://pastebin.com/e9sKVwuj
wait, there is one other thing at the top, you can see.

EDIT Ok, that hasn't happened again, but there is a new thing that just happened, here is the log from it http://pastebin.com/uUfdDjJx

I have to restart the server every time this happens.
Then whenever someone joins, I get this:
2012-07-24 23:41:20 [SEVERE] java.lang.StackOverflowError
2012-07-24 23:41:20 [SEVERE]at java.util.logging.Handler.isLoggable(Handler.java:284)
2012-07-24 23:41:20 [SEVERE]at java.util.logging.StreamHandler.isLoggable(StreamHandler.java:233)
2012-07-24 23:41:20 [SEVERE]at java.util.logging.StreamHandler.publish(StreamHandler.java:191)
2012-07-24 23:41:20 [SEVERE]at java.util.logging.ConsoleHandler.publish(ConsoleHandler.java:105)
2012-07-24 23:41:20 [SEVERE]at java.util.logging.Logger.log(Logger.java:522)
2012-07-24 23:41:20 [SEVERE]at java.util.logging.Logger.doLog(Logger.java:543)
2012-07-24 23:41:20 [SEVERE]at java.util.logging.Logger.log(Logger.java:632)
2012-07-24 23:41:20 [SEVERE]at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:480)
2012-07-24 23:41:20 [SEVERE]at net.minecraft.server.EntityMinecart.F_(EntityMinecart.java:604)
2012-07-24 23:41:20 [SEVERE]at net.minecraft.server.Entity.R(Entity.java:1233)
I put the rest into a pastbin http://pastebin.com/2ps8rJXM

EDIT:Sorry for double post

EDIT: OK, I disabled essentials oversized stacks and it seems to be fixed@!
Edit: No longer watching this thread. Tahg me if you reply.

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