IE tries to download a page instead of rendering it

[Guest]

My team has created a proxy to implement Single sign on.
When I point my IE browser at it The proxy performs as expected, but the
data it sends back to the browser causes it to pop up the file save dialog as
if it doesn't recognize the file as content type=text/html.
The pages renders correctly for other browsers.
Can some one help me determine why IE won't render the page

 

[Guest]

The problem was that my proxy wasn't passing the user agent header through to
the server. The server then passed javascript back based on the wrong browser
type.