CSS Validation Reports HTML Error when HTML Validation says 'Passed Validation'

W3C,

URL In Question:  http://www1.umn.edu/nts/rates/T_index.html

When I validate http://www1.umn.edu/nts/rates/T_index.html through your html validator it passes.

When I attempt to validate [same URL] through your CSS validator I get an HTML error (that I cannot match to my code...something about an img ">" missing).  It refers to an img statement with all the correct HTML enclosures as proved by YOUR HTML validator.  Is this a bug or am I missing something really simple?

Stephen Perkins
NTS Web Development
University of Minnesota