/usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/configuration/connections.rb:118:in `execute_on_servers': undefined method `continue_on_error?' for nil:NilClass (NoMethodError)
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/configuration/actions/invocation.rb:50:in `run'
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/recipes/deploy/strategy/base.rb:43:in `send'
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/recipes/deploy/strategy/base.rb:43:in `method_missing'
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/recipes/deploy/strategy/remote.rb:29:in `scm_run'
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/recipes/deploy/strategy/remote_cache.rb:30:in `update_repository_cache'
        from ./lib/recipes/mirroring.rb:69:in `send'
        from ./lib/recipes/mirroring.rb:69
        from ./lib/recipes/mirroring.rb:68:in `each'
         ... 34 levels...
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/lib/capistrano/cli/execute.rb:14:in `execute'
        from /usr/lib/ruby/gems/1.8/gems/capistrano-1.99.3/bin/cap:4
        from /usr/bin/cap:16:in `load'
        from /usr/bin/cap:16