Index: jquery/src/selector.js
===================================================================
--- jquery/src/selector.js	(revision 5829)
+++ jquery/src/selector.js	(working copy)
@@ -21,7 +21,13 @@
 			odd: function(a,i){return i%2;},
 
 			// Child Checks
-			"first-child": function(a){return a.parentNode.getElementsByTagName("*")[0]==a;},
+			"first-child": function(a){
+				var children = a.parentNode.getElementsByTagName("*");
+				for ( var i = 0 ; i < children.length; i++ ) {
+					if ( children[i].nodeType != 8 ) return children[i] == a;
+				}
+				return children[0] == a;
+			},
 			"last-child": function(a){return jQuery.nth(a.parentNode.lastChild,1,"previousSibling")==a;},
 			"only-child": function(a){return !jQuery.nth(a.parentNode.lastChild,2,"previousSibling");},