The tag is https://svn.mozilla.org/projects/sumo/tags/1.2/126.96.36.199_20090714/ This fixes bug 485329.
It would be good to actually run the indexer if you get the chance (rather than waiting for the 4am cron job) - just to make sure it runs ok on prod :) Instructions are in the staging bug https://bugzilla.mozilla.org/show_bug.cgi?id=503614
Sumo has been upgraded. I'm not sure where the search cronjob is set up, so that hasn't been run yet. Will discuss on IRC.
Found it and it is running.