Validating CSS
In addition to the HTML Validation I perform I can also validate the CSS on my pages.
Generally this is not an issue as most of the CSS is defined in the W3.css framework. Additional CSS for my template is located in portfolio.css. Where there is additional CSS on a page it may be an idea to check the CSS for that page, otherwise the Jigsaw checker will return the same number of warnings.
Jigsaw Warnings
These are extensive and in my case mainly relate to -webkit extensions
There are around 40 to 50 warnings for the