Unspecified vulnerability in Google Chrome before 5.0.375.55 might allow remote attackers to spoof the URL bar via vectors involving unload event handlers.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11644
http://googlechromereleases.blogspot.com/2010/05/stable-channel-update.html