Sometimes I get a broken background in Chrome. I do not get this error with any other browser.
This is the simple CSS line responsible for the background color of b
After trying all of the other solutions here without success, I skeptically tried the solution found in this article, and got it to work.
Essentially, it boils down to removing @charset "utf-8"; from your CSS.
This seems like a poor implementation in DreamWeaver - but it did fix the issue for me, regardless.