Opera before 8.51, when running on Windows with Input Method Editor (IME) installed, allows remote attackers to cause a denial of service (persistent application crash) by bookmarking a site with a long title.
https://exchange.xforce.ibmcloud.com/vulnerabilities/23549
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-4205
http://www.vupen.com/english/advisories/2005/2846
http://www.securityfocus.com/bid/15813