I installed the SCM Sync Configuration plugin, but it never synced any configuration. The log shows many messages like these:

Dec 03, 2012 10:38:00 PM hudson.plugins.scm_sync_configuration.ScmSyncConfigurationBusiness queueChangeSet
INFO: Queue of changeset A hudson.scm.SubversionSCM.xml
A hudson.maven.MavenModuleSet.xml
A config.xml
A hudson.tasks.Ant.xml
A hudson.tasks.Maven.xml
A hudson.tasks.Shell.xml
A hudson.triggers.SCMTrigger.xml
A scm-sync-configuration.xml
A hudson.scm.CVSSCM.xml
A hudson.tasks.Mailer.xml
aborted (scm manipulator not settled !)
Dec 03, 2012 10:32:57 PM hudson.plugins.scm_sync_configuration.ScmSyncConfigurationBusiness queueChangeSet
INFO: Queue of changeset A jobs/en_libraries_build/promotions/Push to pypi/config.xml
A jobs/en_libraries_build/config.xml
aborted (scm manipulator not settled !)

The plugin has been installed for several days, and still has not synced anything. I'm not sure where to look for more information on this error (why isn't the manipulator settled? what does that mean?).

I am able to check out svn directories from other jobs. It even properly warns me when I enter a SVN directory that doesn't exist into the 'Repository URL' box in the 'SCM Sync Configuration' section under 'Manage Jenkins'. Also, I have successfully checked in changes by hand to the target directory with the credentials being used, so I know the svn user has the correct read and write permissions to SVN.

I tried the plugin on a fresh Jenkins install at v1.492, and it worked. Are there known version incompatibilities? For various reasons, upgrading the v1.460 Jenkins installation in question will be difficult (but not impossible), so I'd like to avoid that unless there is some reason to believe it will fix the problem.

Thanks for your time!