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Index: /Users/jgoebel/rails/raptor/vendor/rails/activesupport/lib/active_support/core_ext/time/zones.rb
===================================================================
--- /Users/jgoebel/rails/raptor/vendor/rails/activesupport/lib/active_support/core_ext/time/zones.rb  (revision 8714)
+++ /Users/jgoebel/rails/raptor/vendor/rails/activesupport/lib/active_support/core_ext/time/zones.rb  (working copy)
@@ -6,11 +6,19 @@
         
         def self.included(base) #:nodoc:
           base.extend(ClassMethods) if base == ::Time # i.e., don't include class methods in DateTime
+          base.class_eval do
+            alias_method :minus_without_timezone, :-
+            alias_method :-, :minus_with_timezone
+          end
         end
         
         module ClassMethods
           attr_reader :zone
 
+          def minus_with_timezone(time)
+            ???
+          end
+
           # Sets a global default time zone, separate from the system time zone in ENV['TZ']. 
           # Accepts either a Rails TimeZone object, a string that identifies a 
           # Rails TimeZone object (e.g., "Central Time (US & Canada)"), or a TZInfo::Timezone object