Opera before 8.50 allows remote attackers to spoof the content type of files via a filename with a trailing "." (dot), which might allow remote attackers to trick users into processing dangerous content.
https://github.com/ca-arch/cvelist_example
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-3007
http://www.vupen.com/english/advisories/2005/1789
http://www.securityfocus.com/bid/14880
http://www.securityfocus.com/advisories/9339
http://www.opera.com/docs/changelogs/windows/850/
http://www.opera.com/docs/changelogs/linux/850/