Why W3C Validator showing parsing error on this. I selected CSS3 profile also from dropdown.
a[href $=.xls]{background: transparent url(ms-excel-icon.gif) left top no-repeat;
padding-left: 22px;display: block;height: 16px;}
alt text http://shup.com/Shup/347107/11042455758-My-Desktop.png
They have a nearly identical example up on the W3C site
with the only difference being that there’s no white space between the attribute name and the constraint type and the constraint itself is in quotes.