jQuery UI - CSS not applied (wrong mime type?)

jQuery UI - CSS not applied (wrong mime type?)


Hi there,
I tried using jquery ui for my website. right now, everything works
just fine at least as long as the code itself is looked at.
but none of my dialogues, tabs or whatever is styled! I tried custom
themes, prebuilt themes, no themes, anything i could think of. the
result was always the same:
script works, but no css. so I included the css file by using "link
rel…". still no css. and then i discovered, that there was an error in
my webdeveloper: "Wrong MIME/Type for jqery-ui.min.js".
Now: what the heck? i never had any errors using jsui on my other
websites but all over sudden: mime-type error?
honestly I don't have any idea what is happening here. still, I hope
anybody could help me out, as I'm really… badly… stuck
(ps: please excuse my possibly horrible english, I'm more used
listening it rather than writing it myself )