Originally Posted by Hawk I stopped using colored scrollbars also, I did used them before, & some of my older websites do have them still, but all newer ones don't have it, biggest reason: I try to get valid css/html.

Using a dynamic scripting language, you can make the CSS dynamic and spit different versions depending on the browser/validator:
http://koobi-studio.com/gf/dynamicCss/test.php

The corresponding .txt files contain the source code.
I can tell you how it works if you're interested but I advise against using CSS scrollbars because they are not a good move accessibility wise plus it's a propriety feature.