I installed mollom initially on 3.6 or so. While upgrading, I didn't notice that it stopped working until now (3.8 version).
When I submit a comment with the mollom plugin activated, a WSOD (blank screen) is shown when not in debug mode.
This error is shown on a local test site (that might not have the correct key, since it is running locally):
Warning: include(): Filename cannot be empty in /[...]/wordpress/wp-content/plugins/mollom/includes/EntityComment.php on line 109 Warning: include(): Failed opening '' for inclusion (include_path='.:/usr/local/zend/share/ZendFramework/library:/usr/local/zend/share/pear') in /[...]/wordpress/wp-content/plugins/mollom/includes/EntityComment.php on line 109
I'm running php 5.4 on both the local machine and the webserver that has the error.