Robustness: NewsRob should also make images available offline that don't have an extension
Sometimes in webpages images are referenced where the url doesn't end in a proper image file extension, e.g. ".png".
An actual browser would deal with that by looking at the Content-Type:
curl --head http://feeds.feedburner.com/~ff/Techcrunch?d=yIl2AUoC8zA
HTTP/1.1 200 OK
Expires: Mon, 21 Dec 2009 19:27:43 GMT
Date: Wed, 16 Dec 2009 21:20:45 GMT
NewsRob should somehow deal with that and add the file extension so that the embedded browser can render the images.