I’ve just upgraded my site from 1.7-devel to 1.7 following the upgrade instructions.  I believe that I’ve followed all of the provided steps.

I’m not a Ruby expert and I don’t know how to troubleshoot the following error:

NameError in LoginController#login

uninitialized constant Mime::M

RAILS_ROOT: /home/username/tracks-1.7

Application Trace | Framework Trace | Full Trace

vendor/rails/activesupport/lib/active_support/dependencies.rb:442:in `load_missing_constant’
vendor/rails/activesupport/lib/active_support/dependencies.rb:77:in `const_missing’
vendor/rails/actionpack/lib/action_controller/mime_responds.rb:150:in `const_get’
vendor/rails/actionpack/lib/action_controller/mime_responds.rb:150:in `method_missing’
app/controllers/login_controller.rb:43:in `login’
app/controllers/login_controller.rb:41:in `login’

I found the source of this error.  I had erroneously copied my old routes.rb file to the new installation.

nice find. Those are very difficult to track down