encoding error Rails 3.1

log-2011-05-19

edison$ rails s
=> Booting WEBrick
=> Rails 3.1.0.beta1 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2011-05-19 22:07:41] INFO  WEBrick 1.3.1
[2011-05-19 22:07:41] INFO  ruby 1.9.2 (2011-02-18) [x86_64-darwin10.7.0]
[2011-05-19 22:07:41] INFO  WEBrick::HTTPServer#start: pid=4975 port=3000
Error during failsafe response: "\xC3" from ASCII-8BIT to UTF-8
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:104:in `write'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:104:in `block (2 levels) in flush'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:103:in `each'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:103:in `block in flush'
  <internal:prelude>:10:in `synchronize'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:102:in `flush'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:121:in `auto_flush'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:67:in `add'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:78:in `fatal'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.beta1/lib/action_dispatch/middleware/show_exceptions.rb:133:in `block in log_error'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/deprecation/reporting.rb:20:in `silence'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.beta1/lib/action_dispatch/middleware/show_exceptions.rb:129:in `log_error'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.beta1/lib/action_dispatch/middleware/show_exceptions.rb:64:in `render_exception'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.beta1/lib/action_dispatch/middleware/show_exceptions.rb:59:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/rack/logger.rb:13:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/rack-1.3.0.beta/lib/rack/runtime.rb:17:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/rack-1.3.0.beta/lib/rack/lock.rb:34:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.beta1/lib/action_dispatch/middleware/static.rb:53:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/engine.rb:438:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/rack/log_tailer.rb:14:in `call'
  /Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/rack-1.3.0.beta/lib/rack/handler/webrick.rb:59:in `service'
  /Users/edison/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
  /Users/edison/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
  /Users/edison/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
[2011-05-19 22:07:48] ERROR Encoding::UndefinedConversionError: "\xC3" from ASCII-8BIT to UTF-8
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:104:in `write'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:104:in `block (2 levels) in flush'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:103:in `each'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:103:in `block in flush'
	<internal:prelude>:10:in `synchronize'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/buffered_logger.rb:102:in `flush'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/log_subscriber.rb:84:in `block in flush_all!'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/log_subscriber.rb:84:in `each'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/log_subscriber.rb:84:in `flush_all!'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/rack/logger.rb:29:in `after_dispatch'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/rack/logger.rb:15:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/rack-1.3.0.beta/lib/rack/runtime.rb:17:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.1.0.beta1/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/rack-1.3.0.beta/lib/rack/lock.rb:34:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.1.0.beta1/lib/action_dispatch/middleware/static.rb:53:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/engine.rb:438:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.0.beta1/lib/rails/rack/log_tailer.rb:14:in `call'
	/Users/edison/.rvm/gems/ruby-1.9.2-p180/gems/rack-1.3.0.beta/lib/rack/handler/webrick.rb:59:in `service'
	/Users/edison/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
	/Users/edison/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
	/Users/edison/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'