Another reason to hate M$
Unsupported Cascading Style Sheet Properties Compared with Cascading Style Sheets, Level 1
The following is a list of all the top-level cascading style sheet properties that the Cascading Stylesheet Specification, Level 1 supports, but that Word 2007 does not support. Note that Word 2007 considers unsupported cascading style sheet properties to be unknown properties.
This is taken from this hideous document that Microsoft should be ashamed even exists, I hope the person who was made to write it immediately quit!