Unspecified vulnerability in Opera before 9.64 has unknown impact and attack vectors, related to a "moderately severe issue."
http://www.vupen.com/english/advisories/2009/0586
http://www.securityfocus.com/bid/33961
http://www.opera.com/docs/changelogs/windows/964/
http://www.opera.com/docs/changelogs/solaris/964/
http://www.opera.com/docs/changelogs/mac/964/
http://www.opera.com/docs/changelogs/linux/964/
http://www.opera.com/docs/changelogs/freebsd/964/
http://secunia.com/advisories/34418
http://secunia.com/advisories/34135
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00004.html