bad content body on MC FF

Hi All,

I'm getting the following error in my production.log when I try to
upload a file from MAC FF. On rest of the browsers file uploading is
working fine.

Rendering
/home5/folder_namete/Portfolio/application_name/public/404.html (404 Not
Found)
/!\ FAILSAFE /!\ Wed Jul 21 07:55:45 -0600 2010
  Status: 500 Internal Server Error
  bad content body
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/utils.rb:351:in
`parse_multipart'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/utils.rb:323:in
`loop'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/utils.rb:323:in
`parse_multipart'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/request.rb:133:in
`POST'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:15:in
`call'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/actionpack/lib/action_controller/params_parser.rb:15:in
`call'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/actionpack/lib/action_controller/session/cookie_store.rb:93:in
`call'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/actionpack/lib/action_controller/failsafe.rb:26:in
`call'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
`call'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
`synchronize'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
`call'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:106:in
`call'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/content_length.rb:13:in
`call'
    /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/fastcgi.rb:58:in
`serve'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:103:in
`process_request'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:153:in
`with_signal_handler'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:101:in
`process_request'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:78:in
`process_each_request'
    /usr/lib64/ruby/gems/1.8/gems/fcgi-0.8.8/lib/fcgi.rb:117:in
`session'
    /usr/lib64/ruby/gems/1.8/gems/fcgi-0.8.8/lib/fcgi.rb:104:in
`each_request'
    /usr/lib64/ruby/gems/1.8/gems/fcgi-0.8.8/lib/fcgi.rb:36:in `each'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:77:in
`process_each_request'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:76:in
`catch'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:76:in
`process_each_request'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:51:in
`process!'
    /home5/folder_namete/Portfolio/application_name/vendor/rails/railties/lib/fcgi_handler.rb:23:in
`process!'
    dispatch.fcgi:24

Any idea??

Thanks,

Saurabh