Using the default Winstone Servlet Engine, Hudson returns a HTTP Content-Type
header of "text/html;charset=UTF-8" for all files. This causes a problem when
downloading binary artifacts from either archived artifacts or the workspace:
the browser displays the files' contents inline instead of prompting a Save As
dialog. (This occurs on Firefox 2.0, but not IE7.)

Ideally, the MIME type of the artifacts should be auto-detected, and set within
the Content-Type header.