It looks like users demand for themes and extensions for Google Chrome is showing some impact on latest developer versions on Chrome, which would also include better working with windows 7.
The latest version of Google Chrome, particularly made for developers now has extensions enabled by default and also the support for various themes or skins. There are some changes on user interface too like ‘Application’ shortcut as a separate task bar item.
Developer version is different from normal Chrome that you use on your computers. Most of the people install Chrome from Google directly and they get stable version. By stable, we mean that application will not crash on different configuration computers and works without any errors. Since Chrome is open source, developers keep on improving code to make it better. The developer version is with latest code and functionalities, however there is no guarantee that it would run perfectly everywhere.