Description of problem:
in class com.arsdigita.cms.dispatcher.StreamImage

dispatch(HttpServletRequest,HttpServletResponse,RequestContext) method
does not set content-header of HTTP response.

in line 164, one should add following method :

response.setHeader("Content-Type", mimeType);


Version-Release number of selected component (if applicable):
CMS 6.0

How reproducible:
always

Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
code added for carrefour.fr project, not pushed back before into product.