Opera Software has shipped <A HREF="http://blogs.zdnet.com/security/?p=1761&tag=nl.e539">a new version of its flagship Web browser</A> with fixes for at least seven documented security problems but details on one vulnerability--a cross-site scripting issue reported by Chris Weber--is being kept under wraps. Opera warned that one of the seven flaws is rated "extremely severe" because of the risk of arbitrary code execution.