[A4-]

I'm working on a receipt for Tweakers.net (dutch tech news) and I've got it working, but lots of images wont show up on the Ebook Viewer.
Here is a random newspost with those images which wont show up.
For now I'm only interested in the thumbnails and not the full size ones.
Any help is apreciated

Here's my receipe:

class AdvancedUserRecipe1252025187(BasicNewsRecipe):
    title          = u'Tweakers.net'
    oldest_article = 4
    max_articles_per_feed = 40
    no_stylesheets = True
    use_embedded_content = False

    keep_only_tags = [dict(name='div', attrs={'class':'columnwrapper news'})]

    remove_tags    = [dict(name='div', attrs={'class':'reacties'}),
	         {'id' : ['utracker']},
	         {'class' : ['sidebar']}
	         ]

    feeds          = [(u'Tweakers.net', u'http://tweakers.net/feeds/nieuws.xml')]