Error updating signs: java.lang.NullPointerException? Help please

Hey, Been setting up our server and recently we have started to see this error appearing on the console:

Error updating signs: java.lang.NullPointerException

We have tried remove a few plugins and trying things but nothing seems to work?
has anyone else had this error appear and / or knows how to to fix it,

Much appreciated

Thanks
Peakee

PS: Here my PasteBin of the console
http://pastebin.com/pdWpyf9r

Never Mind i have solved my Own question

It was a plugin called SuperWars

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