Puppet users - Nov 2010 - Something wrong after upgraded to puppet-dashboard 1.04

After upgraded to puppet-dashboard 1.04, when I click links to check
information of nodes or groups , such as  http://localhost:3001/nodes/22,
it return a "We''re sorry, but something went wrong." to me. 
Checking
the log, i got something as follows:

 ActionView::TemplateError (undefined method `<=>'' for
#<NodeGroup id:
5, name:"Web_Marketing">) on line #10 of app/views/shared/_g
roups.html.haml:
  21 7:           %th Group
  22 8:           %th Source
  23 9:       %tbody
  24 10:         - resource.node_groups_with_sources.sort.each do |
group,sources|
  25 11:           %tr
  26 12:             %td
  27 13:               %strong= link_to(group.name,group)
  28
  29     app/views/shared/_groups.html.haml:10:in `<=>''
  30     app/views/shared/_groups.html.haml:10:in `sort''
  31     app/views/shared/_groups.html.haml:10:in
`_run_haml_app47views47shared47_groups46html46haml_locals_groups_object_resource''
  32     haml (3.0.13) [v] rails/./lib/haml/helpers/
action_view_mods.rb:11:in `render''
  33     haml (3.0.13) [v] lib/haml/helpers.rb:90:in `non_haml''
  34     haml (3.0.13) [v] rails/./lib/haml/helpers/
action_view_mods.rb:11:in `render''
  35     app/views/nodes/show.html.haml:17:in
`_run_haml_app47views47nodes47show46html46haml''
  36     haml (3.0.13) [v] rails/./lib/haml/helpers/
action_view_mods.rb:13:in `render''
  37     haml (3.0.13) [v] rails/./lib/haml/helpers/
action_view_mods.rb:13:in `render''
  38     app/controllers/nodes_controller.rb:46:in `show''
  39     haml (3.0.13) [v] rails/./lib/sass/plugin/rack.rb:41:in
`call''


Did anyone encounter this issue?

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