Rails - Aug 2006 - Benchmarking not being included?

I have a problem that''s mystifying me.  I have an application that
uses edge rails, and I would like it to put the high level performance
information in the production logs.  Other apps I have deployed with
rails 1.1 have production logs that look something like this:

Rendering main/index
Completed in 0.06379 (15 reqs/sec) | Rendering: 0.02569 (40%) | DB:
0.02510 (39%) | 200 OK [http://demo.test-server.tv/]


Instead, what I''m seeing looks like this:

Processing MainController#index (for 74.65.211.200 at 2006-08-15 18:30:54) [GET]
  Session ID: a6f5b83d402a394e0369f876470b4319
  Parameters: {"action"=>"index",
"controller"=>"main"}
Rendering  within layouts/main
Rendering main/index


As near as I can tell, the line I want should be emitted by
perform_action_with_benchmark, if the logger is present (which it
clearly is, because I do have output in my production.log).  Do I have
to do something special to make perform_action_with_benchmark get
called instead of just perform_action?

Thanks in advance

Cameron