Opera before 11.62 on UNIX uses world-readable permissions for temporary files during printing, which allows local users to obtain sensitive information by reading these files.
https://exchange.xforce.ibmcloud.com/vulnerabilities/74501
http://www.opera.com/support/kb/view/1015/
http://www.opera.com/docs/changelogs/unix/1162/
http://secunia.com/advisories/48535
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00012.html