diff --git a/actionpack/CHANGELOG b/actionpack/CHANGELOG
index 7eb69f4fbdd5c32c8201bd5895a5fb9cc07993cb..9a75a3852c5eddb80efb17154e00df17af52870d 100644
--- a/actionpack/CHANGELOG
+++ b/actionpack/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Fix NoMethodError when parsing params like &&. [Adam Greenfield]
+
 * Fix flip flopped logic in docs for url_for's :only_path option. Closes #4998. [esad@esse.at]
 
 * form.text_area handles the :size option just like the original text_area (:size => '60x10' becomes cols="60" rows="10").  [Jeremy Kemper]
diff --git a/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb b/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb
index 941646c5300ba6de933bc75da4122320ac8efc09..37eb8d5cd72404f9cf6b20326981204367797d7f 100755
--- a/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb
+++ b/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb
@@ -45,6 +45,7 @@ def CGIMethods.parse_request_parameters(params)
       parsed_params = {}
 
       for key, value in params
+        next if key.nil?
         value = [value] if key =~ /.*\[\]$/
         unless key.include?('[')
           # much faster to test for the most common case first (GET)
diff --git a/actionpack/test/controller/cgi_test.rb b/actionpack/test/controller/cgi_test.rb
index ddf68fdf5bfec3702861bda8a45162dcabebda9d..06f721997db1300b64d0375a7dd619fcc82aaef1 100755
--- a/actionpack/test/controller/cgi_test.rb
+++ b/actionpack/test/controller/cgi_test.rb
@@ -227,6 +227,12 @@ def test_parse_params_with_unmatched_brackets_and_array
     expected  = { "a/b@" => { "c" => { "d[e" => ["f"] }}}
     assert_equal expected, CGIMethods.parse_request_parameters(input)
   end
+  
+  def test_parse_params_with_nil_key
+    input = { nil => nil, "test2" => %w(value1) }
+    expected = { "test2" => "value1" }
+    assert_equal expected, CGIMethods.parse_request_parameters(input)
+  end
 end
 
 class MultipartCGITest < Test::Unit::TestCase