I installed the Campfire plugin and setup the 'Global Campfire Notifier Settings'. My Freestyle Job finishes and the following NPE is thrown:

Aug 12, 2010 3:48:33 PM hudson.model.AbstractBuild$AbstractRunner performAllBuildSteps
WARNING: Publisher hudson.plugins.campfire.CampfireNotifier aborted due to exception
java.lang.NullPointerException
at hudson.plugins.campfire.CampfireNotifier.publish(CampfireNotifier.java:48)
at hudson.plugins.campfire.CampfireNotifier.perform(CampfireNotifier.java:80)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:601)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:580)
at hudson.maven.MavenModuleSetBuild$RunnerImpl.post2(MavenModuleSetBuild.java:598)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:528)
at hudson.model.Run.run(Run.java:1280)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:306)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:127)