The installer in Google Chrome before 14.0.835.163 on Mac OS X does not properly handle lock files, which has unspecified impact and attack vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14428
https://exchange.xforce.ibmcloud.com/vulnerabilities/69869
http://googlechromereleases.blogspot.com/2011/09/stable-channel-update_16.html