Accesskey value 0 not supported

This module doesn't handle a 0 (zero) value for the accesskey.

I tried inserting a 0 while editing the menu entry, but the value isn't stored. Not only is the field empty on the next display of the menu edit form, but there is not an appropriate entry in the options field of the menu_links table.

I even tried to update the table manually and add s:9:"accesskey";s:1:"0"; to the options field. This time when I attempt editting of the menu entry the 0 value is displayed but the accesskey attribute is not displayed in the page source after a refresh of a node.

The only reason I'm not using a different accesskey value is that I understand the standard accesskey for the accessibillity statement is 0.

Drupal version is 6.10 and the Menu Attributes module version is 6.x-1.2.