--- logintoboggan.permissions.js
+++ logintoboggan.permissions.js
@@ -1,77 +1,25 @@
 
 /**
- * This is a custom implementation of user.permissions.js, which is necessary
- * because LoginToboggan needs its pre-auth role to not be explicitly tied to
- * the auth role. The change is minor -- simply exclude the pre-auth role from
- * all the auto-checking as the anon and auth user roles are.
+ * LoginToboggan needs its pre-auth role to not be explicitly tied to
+ * the auth role.
  */
-
 (function ($) {
 
 /**
  * Shows checked and disabled checkboxes for inherited permissions.
  */
-Drupal.behaviors.permissions = {
-  attach: function (context) {
-    var self = this;
-    $('table#permissions').once('permissions', function () {
-      // On a site with many roles and permissions, this behavior initially has
-      // to perform thousands of DOM manipulations to inject checkboxes and hide
-      // them. By detaching the table from the DOM, all operations can be
-      // performed without triggering internal layout and re-rendering processes
-      // in the browser.
-      var $table = $(this);
-      if ($table.prev().length) {
-        var $ancestor = $table.prev(), method = 'after';
-      }
-      else {
-        var $ancestor = $table.parent(), method = 'append';
-      }
-      $table.detach();
-
-      // Create dummy checkboxes. We use dummy checkboxes instead of reusing
-      // the existing checkboxes here because new checkboxes don't alter the
-      // submitted form. If we'd automatically check existing checkboxes, the
-      // permission table would be polluted with redundant entries. This
-      // is deliberate, but desirable when we automatically check them.
-      var $dummy = $('<input type="checkbox" class="dummy-checkbox" disabled="disabled" checked="checked" />')
-        .attr('title', Drupal.t("This permission is inherited from the authenticated user role."))
-        .hide();
-
-      $('input[type=checkbox]', this).not('.rid-2, .rid-1, .rid-' + Drupal.settings.LoginToboggan.preAuthID).addClass('real-checkbox').each(function () {
-        $dummy.clone().insertAfter(this);
+Drupal.behaviors.LoginTobogganPermissions = {
+  attach: function (context, settings) {
+    // Revert changes made by modules/user/user.permissions.js
+    $('table#permissions', context).once('tobogganPermissions', function () {
+      $('input[type=checkbox]', this).filter('.rid-' + settings.LoginToboggan.preAuthID).removeClass('real-checkbox').each(function () {
+        $(this).next().filter('.dummy-checkbox').remove();
+        $('input.rid-' + settings.LoginToboggan.preAuthID).each(function () {
+          this.style.display = '';
+        });
       });
-
-      // Initialize the authenticated user checkbox.
-      $('input[type=checkbox].rid-2', this)
-        .bind('click.permissions', self.toggle)
-        // .triggerHandler() cannot be used here, as it only affects the first
-        // element.
-        .each(self.toggle);
-
-      // Re-insert the table into the DOM.
-      $ancestor[method]($table);
     });
   },
-
-  /**
-   * Toggles all dummy checkboxes based on the checkboxes' state.
-   *
-   * If the "authenticated user" checkbox is checked, the checked and disabled
-   * checkboxes are shown, the real checkboxes otherwise.
-   */
-  toggle: function () {
-    var authCheckbox = this, $row = $(this).closest('tr');
-    // jQuery performs too many layout calculations for .hide() and .show(),
-    // leading to a major page rendering lag on sites with many roles and
-    // permissions. Therefore, we toggle visibility directly.
-    $row.find('.real-checkbox').each(function () {
-      this.style.display = (authCheckbox.checked ? 'none' : '');
-    });
-    $row.find('.dummy-checkbox').each(function () {
-      this.style.display = (authCheckbox.checked ? '' : 'none');
-    });
-  }
 };
 
 })(jQuery);