Build Pipeline plugins has stopped working after I upgraded from 1.500 to 1.522. I dont see exceptions in the log, but the plugin view just doesnt show anything. The only error i see in the log is given below. Downgrading to 1.500 did not work either.

INFO: Prepared all plugins
Jul 12, 2013 12:44:11 AM hudson.ExtensionFinder$GuiceFinder$FaultTolerantScope$1 error
WARNING: Failed to instantiate optional component org.jfrog.hudson.ivy.ArtifactoryIvyConfigurator$DescriptorImpl; skipping
Jul 12, 2013 12:44:11 AM jenkins.InitReactorRunner$1 onAttained