Items causing server to crash and unknown errors

The new items are causing my server to crash..anyone else get this?

and can someone explain what this error means?
at net.minecraft.server.ThreadServerApplication.run(SourceFile:818)
Caused by: java.net.UnknownHostException: sjc4-mc-ssd.beastnode.com
at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:866)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1258)
at java.net.InetAddress.getLocalHost(InetAddress.java:1434)
... 23 more
2012-10-29 14:14:31 [INFO] Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]

 

My server crashes sometimes as well. I'm pretty sure it's because of the new 1.4 items. What it kicks me for when it crashes:

Code:

Internal exception: java.net.SocketException: Connection reset

I don't want to post it on the bug site, as I am unsure why it crashes, but it may be (as KevinEssence said) the new 1.4 items... but yet it may not. I have battled Withers without it crashing and used the new Beacons without it crashing, as well. Maybe EvilSeph could advise me what to do to try and reproduce this?

 

Okay, seems like new carrots and heads ect.