I was having all sorts of problems upgrading Mildred to Rails 2.1.  A lot of the errors I was seeing were like the following: ArgumentError in ‘TracksController downloading a track by admin should not be a redirection’ wrong number of arguments (0 for 1) /Users/ewollesen/src/mildred/app/models/track.rb:52:in `title’ /Users/ewollesen/src/mildred/app/models/track.rb:52:in `filename’ /Users/ewollesen/src/mildred/app/controllers/tracks_controller.rb:49:in `download’ ./spec/controllers/tracks_controller_spec.rb:82: It took me a [...]