When deploying the latest version of jenkins.war (1.440) - I get a stack trace when I try and load any of the existing builds.
The stack trace can be found here: http://pastebin.com/qDkgX0Zu
I have spoken to kohsuke on IRC and they said the following:

11:50:22 <@kohsuke> Tabmow: looks like JBoss has its own slf4j, and Jenkins somehow brings in jcl-over-slf4j that's presumably newer than base slf4j
11:50:53 <@kohsuke> I need to track down slf4j and remove it

Anymore information needed I can be found as Tabmow in #jenkins on freenode.