Review

On line 434, an element is fetched through Enumeration.nextElement()
without checking that there is such an element.

• missing/condition/value_or_state

org/w3c/jigsaw/servlet/JigsawHttpServletRequest.java

getLocale()

class JigsawHttpServletRequest {
    /**
     * Returns the preferred <code>Locale</code> that the client will 
     * accept content in, based on the Accept-Language header.
     * If the client request doesn't provide an Accept-Language header,
     * this method returns the default locale for the server.
     *
     * @return the preferred <code>Locale</code> for the client
     */
    public Locale getLocale() {
	return (Locale)getLocales().nextElement();
    }

}