has_cap was called with an argument that is deprecated since version 2.0

This plugin is throwing the following error in the admin menu:

Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.

The offending function is:

function admin_menu(){
  add_options_page('Editable Comments', 'Editable Comments', 8, 'editable-comments.php',array(&$this,'adminpage'));
}

Passing ‘8’ as a permissions level is no more. This value should be a string. Since I’m the only user I’ve replaced 8 with ‘read’ and the error clears up nicely.

add_options_page('Editable Comments', 'Editable Comments', 'read', 'editable-comments.php',array(&$this,'adminpage'));