diff --git a/activesupport/lib/active_support/core_ext/integer/even_odd.rb b/activesupport/lib/active_support/core_ext/integer/even_odd.rb
index 3762308cc3..7ea4cbf2ba 100644
--- a/activesupport/lib/active_support/core_ext/integer/even_odd.rb
+++ b/activesupport/lib/active_support/core_ext/integer/even_odd.rb
@@ -10,14 +10,14 @@ module EvenOdd
         def multiple_of?(number)
           self % number == 0
         end
-        
+
         def even?
           multiple_of? 2
-        end
-        
+        end if RUBY_VERSION < '1.9'
+
         def odd?
           !even?
-        end
+        end if RUBY_VERSION < '1.9'
       end
     end
   end
diff --git a/activesupport/lib/active_support/core_ext/range/conversions.rb b/activesupport/lib/active_support/core_ext/range/conversions.rb
index 77e86a6ae6..3d12605f4d 100644
--- a/activesupport/lib/active_support/core_ext/range/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/range/conversions.rb
@@ -1,9 +1,9 @@
 module ActiveSupport #:nodoc:
   module CoreExtensions #:nodoc:
     module Range #:nodoc:
-      # Getting dates in different convenient string representations and other objects
+      # Getting ranges in different convenient string representations and other objects
       module Conversions
-        DATE_FORMATS = {
+        RANGE_FORMATS = {
           :db => Proc.new { |start, stop| "BETWEEN '#{start.to_s(:db)}' AND '#{stop.to_s(:db)}'" }
         }
 
@@ -15,7 +15,7 @@ def self.included(base) #:nodoc:
         end
 
         def to_formatted_s(format = :default)
-          DATE_FORMATS[format] ? DATE_FORMATS[format].call(first, last) : to_default_s   
+          RANGE_FORMATS[format] ? RANGE_FORMATS[format].call(first, last) : to_default_s
         end
       end
     end
diff --git a/activesupport/lib/active_support/core_ext/string.rb b/activesupport/lib/active_support/core_ext/string.rb
index b3e1b1189a..5497b6f6f6 100644
--- a/activesupport/lib/active_support/core_ext/string.rb
+++ b/activesupport/lib/active_support/core_ext/string.rb
@@ -10,7 +10,12 @@ class String #:nodoc:
   include ActiveSupport::CoreExtensions::String::Access
   include ActiveSupport::CoreExtensions::String::Conversions
   include ActiveSupport::CoreExtensions::String::Inflections
-  include ActiveSupport::CoreExtensions::String::StartsEndsWith
+  if RUBY_VERSION < '1.9'
+    include ActiveSupport::CoreExtensions::String::StartsEndsWith
+  else
+    alias starts_with? start_with?
+    alias ends_with? end_with?
+  end
   if defined? ActiveSupport::CoreExtensions::String::Iterators
     include ActiveSupport::CoreExtensions::String::Iterators
   end
diff --git a/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb b/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb
index 67174019db..3960669798 100644
--- a/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb
+++ b/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb
@@ -3,6 +3,13 @@ module CoreExtensions #:nodoc:
     module String #:nodoc:
       # Additional string tests.
       module StartsEndsWith
+        def self.included(base)
+          base.class_eval do
+            alias_method :start_with?, :starts_with?
+            alias_method :end_with?, :ends_with?
+          end
+        end
+
         # Does the string start with the specified +prefix+?
         def starts_with?(prefix)
           prefix = prefix.to_s
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index 722bb24a37..cec6772272 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -143,15 +143,23 @@ def test_access_returns_a_real_string
     assert_equal %w(hello), hash.keys
   end
 
-  def test_starts_ends_with
+  def test_starts_ends_with_alias
     s = "hello"
     assert s.starts_with?('h')
     assert s.starts_with?('hel')
     assert !s.starts_with?('el')
 
+    assert s.start_with?('h')
+    assert s.start_with?('hel')
+    assert !s.start_with?('el')
+
     assert s.ends_with?('o')
     assert s.ends_with?('lo')
     assert !s.ends_with?('el')
+
+    assert s.end_with?('o')
+    assert s.end_with?('lo')
+    assert !s.end_with?('el')
   end
 
   # FIXME: Ruby 1.9