[galaxy-dev] bug or feature :)

In our local instance (central version) up to changeset (June 28th) I noticed in the admin panel to manage jobs some odd behaviour; When I set the update Jobs cutoff on 10 seconds and press refresh.... the item below (administrative Job Lock) is also activated and new jobs are locked. Is that a planned feature, a bug or is something wrong in our local instance. Another refresh toggles it back to normal. Alex