Webcam not shown by WebKit

Hi.

I tried to open the following URL with webcam test app:
http://67.53.48.2/CgiStart?page=Single&Language=0

For firefox it shows the image but not so with QtWebKit.

Tried to debug the reason with Web Inspector and it tells that the
image area is of <input type="image"> but transferred as
MIME type multipart/x-mixed-replace. Is this correct?

Attached is the test program, the output of both firefox and test program and also output of web inspector.