jQuery Not Working in Admin Area

Every now and then, WordPress likes to test me. Today it was jQuery not working in the admin section of a clients site. After a little research I found this simple solution. Simply add the following to your wp-config.php file:

define('CONCATENATE_SCRIPTS', false);

Now, this may not work for everyone, it did for me on this occasion. But if I find another solution if/when it happens again, I will add it here.

Update: 11th February 2015
Same issue again today. The solution was to update All In One SEO