CSS code is easy to code, but hard to get right. Dreamweaver CS3 offers features that help developers be aware of potential problems.
The CSS Advisor originates from that wellpool of frustration that web designers face when trying to code for different browsers.
Click the Check Browser Compatibility button.

Figure 7. The Check Browser Compatibility button shows results of browser compatibility issues
The results of the check appear in the Results panel. There are two lines reported, but the issue is the same for both lines. Disconcertingly, there is nothing in the code of the HTML file that causes concern, but instead the style properties defined in the CSS style sheet.
Now that we are at the CSS Advisor, dig around. The CSS Advisor is organized according to CSS properties (useful if a customer has a question about how a given property works) and browsers (useful if a customer has a question about how a certain browser will treat their code).
Customers can post issues and solutions using these categories. The power of this site, though, is that other customers can rate the post and can leave comments on the post.
The posts are ordered by most recent, but customers can see all posts in a certain category, filter according to tagwords, or search on a certain keyword. RSS feeds of the posts (and of edits to the posts) are also available.
The CSS support in Dreamweaver CS3 is tight and intuitive. Therefore, once you get up to speed on the features, I urge you to explore methods of coding CSS differently. In addition to the layouts available in Dreamweaver, check out the CSS resources like CSS Zengarden.