Update monospace font stack fix to work in Safari 4

Author: necolas

normalize.css

@@ -1,4 +1,4 @@
-/*! normalize.css 2011-08-10T00:55 UTC · http://github.com/necolas/normalize.css */
+/*! normalize.css 2011-08-11T09:26 UTC · http://github.com/necolas/normalize.css */
 
 /* =============================================================================
    HTML5 display definitions
@@ -165,15 +165,15 @@ mark {
 }
 
 /*
- * Corrects font family set oddly in IE6, S5, Chrome
+ * Corrects font family set oddly in IE6, S4/5, Chrome
  * en.wikipedia.org/wiki/User:Davidgothberg/Test59
  */
 
 pre,
 code,
 kbd,
 samp {
-    font-family: monospace, monospace;
+    font-family: monospace, serif;
     _font-family: 'courier new', monospace;
     font-size: 1em;
 }