diff -r bd51ca92c013 -r df4f44800923 src/share/classes/com/sun/tools/doclets/formats/html/PackageFrameWriter.java
--- a/src/share/classes/com/sun/tools/doclets/formats/html/PackageFrameWriter.java	Tue May 14 10:14:55 2013 -0700
+++ b/src/share/classes/com/sun/tools/doclets/formats/html/PackageFrameWriter.java	Tue May 14 10:14:55 2013 -0700
@@ -166,7 +166,7 @@
             Arrays.sort(arr);
             boolean printedHeader = false;
             HtmlTree ul = new HtmlTree(HtmlTag.UL);
-            ul.addAttr(HtmlAttr.TITLE, labelContent.toString());
+            ul.setTitle(labelContent);
             for (int i = 0; i < arr.length; i++) {
                 if (documentedClasses != null &&
                         !documentedClasses.contains(arr[i])) {