Ken,

 Thank you for the reply.  I have just tried this, but I am unclear whether or not it worked.  I replaced the line as you suggested, and the warning does not appear.  However, when I view the resulting source there is no reference at all to the syntaxhighlighter.css.  It looks as if the entire <link ... /> reference is not even there...  Yes, I have cleared my cache/browsing history/Ctrl+F5 with same result.

Is this an expected behavior?  How can I verify that the CSS file is being properly included/referenced?

 -Tim