Opera before 11.62 allows remote attackers to spoof the address field by triggering a page reload followed by a redirect to a different domain.
https://exchange.xforce.ibmcloud.com/vulnerabilities/74353
http://www.opera.com/support/kb/view/1014/
http://www.opera.com/docs/changelogs/windows/1162/
http://www.opera.com/docs/changelogs/unix/1162/
http://www.opera.com/docs/changelogs/mac/1162/
http://secunia.com/advisories/48535
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00012.html