--- a/include/utilities/indirect.h	Sun Feb 07 21:10:54 2010 -0800
+++ b/include/utilities/indirect.h	Tue Feb 09 11:05:48 2010 -0800
@@ -60,7 +60,7 @@
 
                     ThreeOutcomeCompare(const Comparison& cmp = Comparison()): Comparison(cmp)              {}
 
-    int             compare(const first_argument_type& a, const second_argument_type& b) const          
+    int             compare(first_argument_type a, second_argument_type b) const          
     {   if (operator()(a,b))        return -1;
         else if (operator()(b,a))   return 1;
         else                        return 0;