"Opera pushed out an update to its popular web browser on Tuesday that fixes vulnerabilities it described as "extremely severe".
The update fixes seven security bugs, some of which were previously
known. Version 9.63 of the browser addresses separate code injection
risks stemming from flaws in HTML parsing and text inputing,
respectively. A critical bug with similar arbitrary code injection
risks involving the handling of long host names in files has also been
patched.
The latest version of the software also lances a cross-site
scripting flaw, involving XSLT templates, as well as bugs in feed
preview."
Read More: http://www.theregister.co.uk/2008/12/16/opera_update/