Secured Jenkins results in 500 error.
When using the plugin on a secured Jenkins install, adding a job results to a 500 error on the hudson tab. The only way to restore it, is by manually removing the hudson_settings entry in the database. The authentication is correct, since it can read the jobs from jenkins after logging in.
I also tried to manually update the jobs with a rake command (I forgot which one), and it resulted in parsing errors. It got a body tag where it wanted a hr tag.