ASP.NET MVC: Problem with OutputCache

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for my current project it's necessary to generate dynamic CSS...So, i have a partial view which serves as a CSS deliverer... The controller code looks like this:\[code\] [OutputCache(CacheProfile = "DetailsCSS")] public ActionResult DetailsCSS(string version, string id) { // Do something with the version and id here.... bla bla Response.ContentType = "text/css"; return PartialView("_css"); }\[/code\]The output cache profile looks like:\[code\]<add name="DetailsCSS" duration="360" varyByParam="*" location="Server" varyByContentEncoding="none" varyByHeader="none" />\[/code\]The problem is: When i use the OutputCache line ([OutputCache(CacheProfile = "DetailsCSS")]), the response is of content type "text/html", instead of "text/css"... when i remove it, it works as expected...So, for me it seems that the OutputCache doesn't save my "ContentType" setting here... is there any way around this?Thanks