From Magnus Kessler, "After a closer look at this particular issue, I used some grep and sed magic

to fix all occurrences of "macro's" and "paramter".
"

include/osg/FragmentProgram

@@ -127,13 +127,13 @@ class OSG_EXPORT FragmentProgram : public StateAttribute
         virtual int compare(const osg::StateAttribute& sa) const
         {
             // check the types are equal and then create the rhs variable
-            // used by the COMPARE_StateAttribute_Paramter macro's below.
+            // used by the COMPARE_StateAttribute_Parameter macros below.
             COMPARE_StateAttribute_Types(FragmentProgram,sa)
 
             // compare each parameter in turn against the rhs.
             COMPARE_StateAttribute_Parameter(_fragmentProgram)
 
-            return 0; // passed all the above comparison macro's, must be equal.
+            return 0; // passed all the above comparison macros, must be equal.
         }
 
         virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const