Google Chrome 6.0.472.59 comes out just 12 days after the last Chrome release, which fixed 14 security bugs. Most of the security flaws fixed in the new release are in the Windows version of Chrome, but the most serious bug is only in Chrome for Mac. Google in July announced that it was increasing the bug bounties it pays to researchers who disclose security vulnerabilities in Chrome, jacking up the highest reward to $3133.70. In the last two major releases, Google has fixed a total of 24 vulnerabilities in the browser, many of them rated either critical or high.
Source: https://threatpost.com/google-fixes-10-bugs-new-chrome-release-091510/74471/