How does the authorize function work??

Hello, we have been developing a class to manage product supplier data (see this thread for the outline) . Everything was working great until we updated to 1.5.8. Now when we view the supplier listing we get a 403 - access forbidden message. We have traced this to a modification of the function authorize () in the admin helper.php file. If we comment out the follow lines of code

if(!$this->isIn($task,array('modify_views','add','modify','delete','display'))){
return false;
}

our product supplier listings reappear. Looking at other controllers and classes I cannot work out what changes need to made to allow our supplier listings to be viewed. Any suugestions most welcome.

This is all in the admin part of the site.

Thansk, James

Hi Nicolas, thanks for the pointer. The reason why it had stopped working with the latest version of the authorize function is that we were missing the square brackets after our this->diplay in our supplierContoller and therefore the listing display was not in the array.