Index: src/wp-includes/user.php
===================================================================
--- src/wp-includes/user.php	(revision 31693)
+++ src/wp-includes/user.php	(working copy)
@@ -1766,42 +1766,47 @@
 }
 
 /**
- * Insert an user into the database.
+ * Insert a user into the database.
  *
- * Most of the $userdata array fields have filters associated with the values.
- * The exceptions are 'rich_editing', 'role', 'jabber', 'aim', 'yim',
- * 'user_registered', and 'ID'. The filters have the prefix 'pre_user_' followed
- * by the field name. An example using 'description' would have the filter
- * called, 'pre_user_description' that can be hooked into.
+ * Some `$userdata` fields also have 'pre_user_' filters associated with the values.
  *
  * @since 2.0.0
+ * @since 3.6.0 The `aim`, `jabber`, and `yim` fields were removed as default user contact
+ *              methods for new installs. See {@see wp_get_user_contact_methods()}.
  *
  * @global wpdb $wpdb WordPress database object for queries.
  *
  * @param array $userdata {
  *     An array, object, or WP_User object of user data arguments.
  *
- *     @type int         $ID              User ID. If supplied, the user will be updated.
- *     @type string      $user_pass       The plain-text user password.
- *     @type string      $user_login      The user's login username.
- *     @type string      $user_nicename   The URL-friendly user name.
- *     @type string      $user_url        The user URL.
- *     @type string      $user_email      The user email address.
- *     @type string      $display_name    The user's display name.
- *                                        Default is the the user's username.
- *     @type string      $nickname        The user's nickname. Default
- *                                        Default is the the user's username.
- *     @type string      $first_name      The user's first name. For new users, will be used
- *                                        to build $display_name if unspecified.
- *     @type stirng      $last_name       The user's last name. For new users, will be used
- *                                        to build $display_name if unspecified.
- *     @type string|bool $rich_editing    Whether to enable the rich-editor for the user. False
- *                                        if not empty.
- *     @type string      $user_registered Date the user registered. Format is 'Y-m-d H:i:s'.
- *     @type string      $role            User's role.
- *     @type string      $jabber          User's Jabber account username.
- *     @type string      $aim             User's AIM account username.
- *     @type string      $yim             User's Yahoo! messenger username.
+ *     @type int         $ID                   User ID. If supplied, the user will be updated.
+ *     @type string      $user_pass            The plain-text user password.
+ *     @type string      $user_login           The user's login username.
+ *     @type string      $user_nicename        The URL-friendly user name.
+ *     @type string      $user_url             The user URL.
+ *     @type string      $user_email           The user email address.
+ *     @type string      $display_name         The user's display name.
+ *                                             Default is the the user's username.
+ *     @type string      $nickname             The user's nickname.
+ *                                             Default is the the user's username.
+ *     @type string      $first_name           The user's first name. For new users, will be used
+ *                                             to build the user's display name if `$display_name`
+ *                                             is not specified.
+ *     @type stirng      $last_name            The user's last name. For new users, will be used
+ *                                             to build the user's display name if `$display_name`
+ *                                             is not specified.
+ *     @type string      $description          The user's description.
+ *     @type string|bool $rich_editing         Whether to enable the rich-editor for the user.
+ *                                             False if not empty.
+ *     @type string|bool $comment_shortcuts    Whether to enable comment moderation keyboard shortcuts
+ *                                             for the user. Default false.
+ *     @type string      $admin_color          Admin color scheme for the user. Default 'fresh'.
+ *     @type bool        $use_ssl              Whether the user should always access the admin over
+ *                                             https. Default false.
+ *     @type string      $user_registered      Date the user registered. Format is 'Y-m-d H:i:s'.
+ *     @type string|bool $show_admin_bar_front Whether to display the Admin Bar for the user on the
+ *                                             site's frontend. Default true.
+ *     @type string      $role                 User's role.
  * }
  * @return int|WP_Error The newly created user's ID or a WP_Error object if the user could not
  *                      be created.
@@ -1969,7 +1974,7 @@
 
 	$meta['rich_editing'] = empty( $userdata['rich_editing'] ) ? 'true' : $userdata['rich_editing'];
 
-	$meta['comment_shortcuts'] = empty( $userdata['comment_shortcuts'] ) ? 'false' : $userdata['comment_shortcuts'];
+	$meta['comment_shortcuts'] = empty( $userdata['comment_shortcuts'] ) || 'false' === $userdata['comment_shortcuts'] ? 'false' : 'true';
 
 	$admin_color = empty( $userdata['admin_color'] ) ? 'fresh' : $userdata['admin_color'];
 	$meta['admin_color'] = preg_replace( '|[^a-z0-9 _.\-@]|i', '', $admin_color );
Index: tests/phpunit/tests/user.php
===================================================================
--- tests/phpunit/tests/user.php	(revision 31693)
+++ tests/phpunit/tests/user.php	(working copy)
@@ -308,7 +308,7 @@
 		// Test update of fields in _get_additional_user_keys()
 		$user_data = array( 'ID' => $user_id, 'use_ssl' => 1, 'show_admin_bar_front' => 1,
 						   'rich_editing' => 1, 'first_name' => 'first', 'last_name' => 'last',
-						   'nickname' => 'nick', 'comment_shortcuts' => 1, 'admin_color' => 'classic',
+						   'nickname' => 'nick', 'comment_shortcuts' => 'true', 'admin_color' => 'classic',
 						   'description' => 'describe' );
 		wp_update_user( $user_data );