Bringt das einspaltige Dashboard wieder in WP 3.8 zurück.

dashboard-toolbox.php

<?php
/*
Module Name: Einspaltiges Dasboard
Description: Erstellt die Möglichkeit eines einspaltigen WP-Dashboards [Backend]
Author: Andreas Hecht
Author URI: http://hechtmediaarts.com
*/

/* Sicherheitsabfrage */
if ( !class_exists('Toolbox') ) {
  die();
}

// force one-column dashboard
function shapeSpace_screen_layout_columns($columns) {
	$columns['dashboard'] = 1;
	return $columns;
}
add_filter('screen_layout_columns', 'shapeSpace_screen_layout_columns');

function shapeSpace_screen_layout_dashboard() { return 1; }
add_filter('get_user_option_screen_layout_dashboard', 'shapeSpace_screen_layout_dashboard');