Hi, The baseline module I'm developing needs to add the <span> tag to the allowed_html value for the filtered_html text filter when enabled. I've searched the core modules, the standard installation profile, Drupal.org and Google, but I haven't been able to find an example of the proper way to do this in a module.install's hook_enable(). I assume I should use filter_format_save() and tried the following: filter_format_save('filtered_html', 'filter_html', 1, 1, array( 'settings' => array( 'allowed_html' => '<a> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd> <span>' ) ) ); This resulted in "PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'format' cannot be null" which I don't understand because the first argument to filter_format_save() is the format. Could someone point me in the right direction? Thanks, Cameron