Visual/CSS Regression Testing -- Catching the "unintended consequences" of modifying your theme
Have you ever spent hours poring over a web application when making changes to the theme, looking for the consequences of CSS style rules that are too broad? Ever made changes to a client's website, only to find out the theming for the newly designed front page totally screwed up the formatting on the product pricing page -- after you deployed the changes?
You are not alone.