Opera 8.01 allows remote attackers to conduct cross-site scripting (XSS) attacks or modify which files are uploaded by tricking a user into dragging an image that is a "javascript:" URI.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-2407
http://www.vupen.com/english/advisories/2005/1251
http://www.securityfocus.com/bid/14410
http://www.opera.com/linux/changelogs/802/