Any ideas what the problem is here? It's showing up on the edit page for a restful resource.
Extracted source (around line #3):
1: <h1>Editing content</h1> 2: 3: <% form_for([:admin, @content]) do |f| %> 4: <%= f.error_messages %> 5: 6: <p>
Trace /usr/local/lib/ruby/gems/1.8/gems/facets-2.4.1/lib/facets/hash/ slice.rb:8:in `fetch' /usr/local/lib/ruby/gems/1.8/gems/facets-2.4.1/lib/facets/hash/ slice.rb:8:in `slice' /usr/local/lib/ruby/gems/1.8/gems/facets-2.4.1/lib/facets/hash/ slice.rb:7:in `each' /usr/local/lib/ruby/gems/1.8/gems/facets-2.4.1/lib/facets/hash/ slice.rb:7:in `slice' /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ helpers/form_helper.rb:699:in `initialize' /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ helpers/form_helper.rb:317:in `new' /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ helpers/form_helper.rb:317:in `fields_for' /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ helpers/form_helper.rb:253:in `form_for_without_haml' /usr/local/lib/ruby/gems/1.8/gems/haml-2.0.0/lib/haml/helpers/ action_view_mods.rb:124:in `form_for' app/views/admin/contents/edit.html.erb:3:in `_run_erb_47app47views47admin47contents47edit46html46erb'