An illegal choice has been detected. Please contact the site administrator.

when assigning the publish/unpublish permissions i received the following error:
An illegal choice has been detected. Please contact the site administrator.

when i looked at the module code i found that sometimes the permissions have spaces in front of them:
$perms[] = ' publish '. check_plain($type->type) .' content';
$perms[] = ' publish own '. check_plain($type->type) .' content';
$perms[] = 'unpublish '. check_plain($type->type) .' content';
$perms[] = 'unpublish own '. check_plain($type->type) .' content';

when i removed the spaces everywhere everything was working again without the error

our webserver is protected by the suhosin layer (http://www.hardened-php.net/suhosin/) so perhaps that module strips the post variables after the submit