getTableIndex: Integer to String (ClassCastException)

Have a project using MyFaces 1.1.5 and Tomahawk 1.1.7. When MyFaces 1.1.5 is upgraded to 1.1.6 classcast exceptions are thrown when elements such as HtmlInputText try to access getTabIndex through an EL expression that returns an "int". Though the spec states that the EL expression should return a string, this was not a problem in the previous version. If tag attributes are more strict in the latest release, it would help to have stated so in the release notes.