Is there a validator for CSS that works with what Prince allows. I tried w3c and found it to not be very helpful.

Jim Albright
Wycliffe Bible Translators

This is an enormous issue for us. Online validators might show 1,000 false errors, making it impossible to find the actual error. Even when set to CSS3 compatibility, every @page rule throws an error...

Prince 11 has an all new CSS parser with improved conformance to the specification and... syntax validation! At last.