I loaded up a job conf page on the history server and used one of the search boxes to narrow the results. I then navigated to other pages (e.g.: map tasks, logs, etc.) then navigated back to the job conf page using the job configuration link on the left side of the page. When I arrived it promptly showed me just a few conf entries (the ones I had searched for earlier) but my search term was missing. At first glance it looked like those were the only entries in the entire job conf, which can be very confusing. Somehow the search term is being remembered but not replotted when the configuration page is revisited.