I’m having the same problem. My error is listed below. It’s an awesome plugin. The best in the columns category I think. Can you help me figure out what it might be?
Notice: register_uninstall_hook was called incorrectly. Only a static class method or function can be used in an uninstall hook. Please see Debugging in WordPress for more information. (This message was added in version 3.1.) in /home/green83/public_html/clients/weinsteinau/wp-includes/functions.php on line 3041
Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /home/green83/public_html/clients/weinsteinau/wp-includes/functions.php on line 2998