"Node Type Filter" causing problem

I just installed the "Node Type Filter" module (http://drupal.org/project/node_type_filter). Whenever this module is enabled, I am not able to manage content. If I try to Delete, Unpublish, or otherwise manage content I get the error "An illegal choice has been detected. Please contact the site administrator." When the module is disabled I do not get this error.

I was able to determine the problem, but not the solution. When the module is disabled, the admin/content/node form always submits the same form_build_id (for me, 'form-912b87b...'). When the module is enabled, the admin/content/node submits a different form_build_id (for me, 'form-9fb6196...').

Does anybody have any idea why this is happening? Thanks in advance. 8)