Can anyone recommend a comprehensive resource, such as a book or website, that provides a complete list of CSS elements and their compatibility with the major web browsers? Specifically, I am interested in information regarding compatibility with IE8 and FireFox3 (Chrome compatibility is less critical for my needs). Unfortunately, many of the resources I have come across do not include information on IE8, so I am seeking a current and thorough resource that covers compatibility for IE6, IE7, and IE8.
For instance, if I plan to use the 'border-spacing' property, I would like to know which browsers do not support it, if any.