Mac version of Chrome, from the very page you linked to:
"An early developer channel version is now available! While it's not at beta quality, it is coming along nicely. If you want to try it right now, see Early Access Release Channels for download instructions."
"Please enter your email address below and we'll let you know when it's released."
An early developer channel version is not a release, else Google would call it so.
Further, it's ridiculous to expect a designer to download a developer release of a browser just to make sure his personal blog is design compliant for a moving target.
Since it doesn't render correctly on Firefox it's very likely that he didn't design for smaller screen sizes, which I find to be a common usability error made by people with print design backgrounds.
http://www.google.com/chrome/intl/en/mac.html