[Mooff]

At first glance it seems like they change how the picture url for attachments are saved in the database (we are not on 4.1.11 yet, so i can't check).

untested:

change

					if(is_resource($sprite) AND $article['previewimage'] )
					{                   				
						$imageinfo = getimagesize($article['previewimage']);
						if(is_array($imageinfo))
						{

to

					if(is_resource($sprite) AND $article['previewimage'] )
					{                   				
                                                if(substr($article['previewimage'],0,10) == 'attachment')
                                                {
                                                       $article['previewimage'] = 'http://www.your_site/' . $article['previewimage'];
                                                };
						$imageinfo = getimagesize($article['previewimage']);
						if(is_array($imageinfo))
						{

with 'your_site' beeing your site.