It might not have anything to do with the theme, bt maybe someone can help anyway: the thumbnails in the excerpts won't show up any more! Any idea how to resolve this?
The site is: www.elektroretailmagazine.nl

Ok, seems I have found an answer. I was using a new version of the plugin 'thumbnails for excerpts'. I donwgraded to a previous version and the thumbs showed up again!