Using promoted_builds plugin in build job with manual approval to trigger promotion process which triggers build on another job (deploy).

Build (maven2) job triggers promotion job which finishes successfully. Build job hangs indefinitely with following last message to console:
Waiting for the completion of deploy

Following is logged when deploy job finishes:
INFO: deploy #3 main build action completed: SUCCESS
Jul 11, 2013 12:26:05 PM hudson.model.Executor run
SEVERE: Executor threw an exception
java.lang.IllegalArgumentException: promotion
at hudson.maven.ModuleName.fromString(ModuleName.java:97)
at hudson.maven.MavenModuleSet.getItem(MavenModuleSet.java:352)
at hudson.maven.MavenModuleSet.getItem(MavenModuleSet.java:115)
at jenkins.model.Jenkins.getItem(Jenkins.java:2248)
at jenkins.model.Jenkins.getItem(Jenkins.java:2271)
at hudson.model.Items.fromNameList(Items.java:98)
at join.JoinTrigger$DescriptorImpl$RunListenerImpl.notifyJob(JoinTrigger.java:405)
at join.JoinTrigger$DescriptorImpl$RunListenerImpl.onCompleted(JoinTrigger.java:398)
at hudson.model.listeners.RunListener.fireCompleted(RunListener.java:178)
at hudson.model.Run.execute(Run.java:1552)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:237)

If (promoted) build job is a "free-style" job rather than a maven2 job, build job finishes after promotion job finishes.

If join plugin is disabled, promoted build job finishes after promotion job finishes.