Missing template index.erb when do rake doc:guides

rake (0.8.7)
rails (2.3.8)

rake doc:guides --trace

** Invoke doc:guides (first_time)
** Execute doc:guides
Generating action_controller_overview
Generating contributing_to_rails
Generating plugins
Generating layouts_and_rendering
Generating testing
Generating security
Generating routing
Generating migrations
Generating debugging_rails_applications
Generating nested_model_forms
Generating performance_testing
Generating configuring
Generating action_mailer_basics
Generating index
rake aborted!
Missing template index.erb in view path /usr/lib/ruby/gems/1.8/gems/
rails-2.3.8/lib/…/guides/rails_guides/…/source
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/paths.rb:
74:in find_template' /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/base.rb: 264:inrender’
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/base.rb:
348:in _render_with_layout' /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/base.rb: 262:inrender’
/usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/…/guides/rails_guides/
generator.rb:51:in generate_guide' /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/../guides/rails_guides/ generator.rb:45:inopen’
/usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/…/guides/rails_guides/
generator.rb:45:in generate_guide' /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/../guides/rails_guides/ generator.rb:30:ingenerate’
/usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/…/guides/rails_guides/
generator.rb:29:in each' /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/../guides/rails_guides/ generator.rb:29:ingenerate’
/usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/tasks/documentation.rake:
58
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in call' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:inexecute’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in each' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:inexecute’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in
invoke_with_call_chain' /usr/lib/ruby/1.8/monitor.rb:242:insynchronize’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in
invoke_with_call_chain' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:ininvoke’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in
invoke_task' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in each' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in
standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:intop_level’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in run' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exception_handling’
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in run' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 /usr/bin/rake:19:inload’
/usr/bin/rake:19

Any ideas?
Mann.