confirmation.html.erb:

Processing Clearance::UsersController#create (for 98.210.200.138 at 2010-10-08 11:11:41) [POST]
  Parameters: {"commit"=>"Sign up", "action"=>"create", "authenticity_token"=>"z40TZ9FfOb+OVT9I6YvYO5jxa/2SjnAbsINvm6ewLmQ=", "controller"=>"clearance/users", "user"=>{"password_confirmation"=>"[FILTERED]", "password"=>"[FILTERED]", "email"=>"happy@captproton.com"}}

ActionView::TemplateError (Missing host to link to! Please provide :host parameter or set default_url_options[:host]) on line #5 of vendor/gems/clearance-0.8.8/app/views/clearance_mailer/confirmation.html.erb:
2: <%= new_user_confirmation_url(
3:       :user_id => @user,
4:       :token   => @user.confirmation_token,
5:       :encode  => false) %>

    (eval):21:in `new_user_confirmation_url'
    clearance (0.8.8) [v] app/views/clearance_mailer/confirmation.html.erb:5
    haml (3.0.16) [v] rails/./lib/haml/helpers/action_view_mods.rb:13:in `render'
    clearance (0.8.8) [v] lib/clearance/user.rb:189:in `send_confirmation_email'
    clearance (0.8.8) [v] app/controllers/clearance/users_controller.rb:15:in `create'
    haml (3.0.16) [v] rails/./lib/sass/plugin/rack.rb:41:in `call'
    vendor/gems/hoptoad_notifier-2.3.5/lib/hoptoad_notifier/rack.rb:27:in `call'
    /home/heroku_rack/lib/static_assets.rb:9:in `call'
    /home/heroku_rack/lib/last_access.rb:15:in `call'
    /home/heroku_rack/lib/date_header.rb:14:in `call'
    thin (1.2.6) lib/thin/connection.rb:76:in `pre_process'
    thin (1.2.6) lib/thin/connection.rb:74:in `catch'
    thin (1.2.6) lib/thin/connection.rb:74:in `pre_process'
    thin (1.2.6) lib/thin/connection.rb:57:in `process'
    thin (1.2.6) lib/thin/connection.rb:42:in `receive_data'
    eventmachine (0.12.10) lib/eventmachine.rb:256:in `run_machine'
    eventmachine (0.12.10) lib/eventmachine.rb:256:in `run'
    thin (1.2.6) lib/thin/backends/base.rb:57:in `start'
    thin (1.2.6) lib/thin/server.rb:156:in `start'
    thin (1.2.6) lib/thin/controllers/controller.rb:80:in `start'
    thin (1.2.6) lib/thin/runner.rb:177:in `send'
    thin (1.2.6) lib/thin/runner.rb:177:in `run_command'
    thin (1.2.6) lib/thin/runner.rb:143:in `run!'
    thin (1.2.6) bin/thin:6
    /usr/ruby1.8.7/bin/thin:19:in `load'
    /usr/ruby1.8.7/bin/thin:19

** [Hoptoad] Failure: Net::HTTPClientError
** [Hoptoad] Environment Info: [Ruby: 1.8.7] [Rails: 2.3.8] [Env: production]
** [Hoptoad] Response from Hoptoad: 
<?xml version="1.0" encoding="UTF-8"?>
<errors>
  <error>No project exists with the given API key.</error>
</errors>
Rendering /disk1/home/slugs/306351_9ef1f00_c91a/mnt/public/500.html (500 Internal Server Error)