Comment nodes are discarded from a merge, for no apparent reason. Fixes #5438.

src/core.js

@@ -444,19 +444,8 @@ jQuery.extend({
 		// expando of getElementsByTagName
 		var i = 0, elem, pos = first.length;
 
-		// Also, we need to make sure that the correct elements are being returned
-		// (IE returns comment nodes in a '*' query)
-		if ( !jQuery.support.getAll ) {
-			while ( (elem = second[ i++ ]) != null ) {
-				if ( elem.nodeType !== 8 ) {
-					first[ pos++ ] = elem;
-				}
-			}
-
-		} else {
-			while ( (elem = second[ i++ ]) != null ) {
-				first[ pos++ ] = elem;
-			}
+		while ( (elem = second[ i++ ]) != null ) {
+			first[ pos++ ] = elem;
 		}
 
 		return first;