Google Chrome before 6.0.472.53 does not properly restrict the characters in URLs, which allows remote attackers to spoof the appearance of the URL bar via homographic sequences.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12176
http://googlechromereleases.blogspot.com/2010/09/stable-and-beta-channel-updates.html