Just a week after releasing its last update to the Chrome browser, Google has released another new version, 6.0.472.59, for all platforms (Windows, Mac OS X, and Linux), in the Stable and Beta channels. A corresponding release is also available for the Chrome Frame (plugin for Internet Explorer) beta. This release incorporates fixes for 10 security vulnerabilities, although some of these affect only a single platform. Further information on the fixes is available in the release announcement on the official Google Chrome Releases blog.
Because of the security content of this release, I recommend that you upgrade to it as soon as you can. You can obtain the new version via the built-in update mechanism ( Menu / About Google Chrome ); if you are using Linux, it should be available via your standard package management tool.