HTTP Headers text/css and text/plain not consistent?

List,

I posted earlier this week about a problem I was experiencing with the
style sheet loading fine locally and on IIS, but failing to load in
production on all browsers except IE. As it turns out, my site admins
are going to fix the problem so the style sheets are always returned
as text/css. I have a question, however. I have had several pages
that use css (http://www.wisc.edu/uwcc) in production for a couple
years. These have loaded fine on all browsers and they also render
the css more-or-less correctly. On them, I have

<LINK REL=stylesheet TYPE="text/css" HREF="css/template.css"
TITLE="Category">

whereas on the new page ( http://www.wisc.edu/uwcc/farmercoops03 ) I
have the external sheet linked as
<style type="text/css" media="all">@import url(fc03.css);</style>.

In both cases the Response Header content-type is text/plain. My
question is this:

Why do the style sheets seem to load and render correctly on the page
http://www.wisc.edu/uwcc even as text/plain whereas nothing seems to
load or work for http://www.wisc.edu/uwcc/farmercoops03 under the same
conditions?


Thanks much for any insights,

Mike Grinnell