Host cloning does not appear to be working for me.

1. I have a host defined with FQDN, HG, environment, puppetmaster, one class and one parameter.
2. I click "clone". The initial "Clone Host" page loads (/hosts/hostname/clone). The Name field is highlighted in red and says "already taken". The yellow warning popup in the upper right corner says "The following fields need reviewing" (and nothing more). The items on the Puppet Classes and Additional Information tabs look fine. The Parameters tab is OK, but is showing raw HTML in place of the host_host_parameters_attributes_0_name input field and its label.
3. When I click "Submit", I just get the page spit back to me with the following in production.log:
   

   Started POST "/hosts" for 10.13.6.244 at Fri Mar 30 16:23:57 -0400 2012
     Processing by HostsController#create as HTML
     Parameters: {"host"=>{"puppet_proxy_id"=>"1", "enabled"=>"1", "hostgroup_id"=>"1", "name"=>"jantmanvm2.eng.domain.com", "host_parameters_attributes"=>{"0"=>{"nested"=>"", "_destroy"=>"false", "value"=>"[FILTERED]"}}, "overwrite"=>"false", "model_id"=>"1", "comment"=>"test for foreman UI", "compute_resource_id"=>"", "managed"=>"1", "is_owned_by"=>"1-Users", "environment_id"=>"5", "puppetclass_ids"=>["", "121"]}, "authenticity_token"=>"asdfghjklasdfghjkl=", "utf8"=>"✓", "commit"=>"Submit"}
   Failed to save: Host parameters name can't be blank, Host parameters name can't be blank or contain trailing white space, Name has already been taken
   Rendered puppetclasses/_selectedClasses.html.erb (0.7ms)
   Rendered puppetclasses/_classes.html.erb (151.0ms)
   Rendered puppetclasses/_class_selection.html.erb (155.7ms)
   Rendered common_parameters/_parameter.erb (4.1ms)
   Rendered common_parameters/_parameter.erb (3.9ms)
   Rendered common_parameters/_parameters.erb (9.9ms)
   Rendered hosts/_form.html.erb (277.3ms)
   Rendered bookmarks/_list.html.erb (1.8ms)
   Rendered bookmarks/_list.html.erb (0.5ms)
   Rendered home/_settings.html.erb (4.3ms)
   Rendered home/_user_dropdown.rhtml (0.9ms)
   Rendered home/_topbar.rhtml (15.2ms)
   Rendered hosts/new.html.erb within layouts/application (297.8ms)
   Completed 200 OK in 335ms (Views: 295.5ms | ActiveRecord: 9.0ms)