XML error for css validation - validates for XHTML

When I run the html validator (http://validator.w3.org/) on:
http://itv.engineering.ucdavis.edu it validates as xhtml 1.0 transitional.
But when I try to run the css validator
(http://jigsaw.w3.org/css-validator/) I get this error:

Error
Target: http://itv.engineering.ucdavis.edu

Please, validate your XML document first!

Line 24

Column 30

Element type "null" must be followed by either attribute specifications, ">"
or "/>". 

Anyone know what this means? Is this an error in our code or a glitch in the
css validator?

Jennifer Kucich

530-752-9343
jlkucich@ucdavis.edu
1043 Academic Surge
----------------------
Engineering Academic Computing Services
http://engineering.ucdavis.edu
College of Engineering
UC Davis
----------------------
engineeringweb@ucdavis.edu - for web design or maintenance requests
http://webservices.engineering.ucdavis.edu

Received on Monday, 2 August 2004 17:22:58 UTC