google_analytics.diff

 <script type="text/javascript">
   var _gaq = _gaq || [];
   _gaq.push(['_setAccount', 'UA-XXXXXXXX-X']);
+  _gaq.push(['_setCampSourceKey', 'utm_source']);
+  _gaq.push(['_setCampMediumKey', 'utm_medium']);
+  _gaq.push(['_setCampContentKey', 'utm_content']);
+  _gaq.push(['_setCampTermKey', 'utm_keyword']);
+  _gaq.push(['_setCampNameKey', 'utm_campaign']);
   _gaq.push(['_trackPageview']);
 
   (function() {
     var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
     ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
     var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
   })();
 </script>

This is not needed. These are the default values. The _setCamp* functions should be used only if you want to change the default values.