Fixes an issue in Magento CE 1.8.1.0 and EE 1.13.1.0 where using a symlinked media directory breaks CMS upload functionality in the admin.

Must be enabled in the Admin under System > Config > Advanced > Developer.

• http://www.magentocommerce.com/bug-tracking/issue?issue=16088
• http://stackoverflow.com/a/21547351/763468
• http://magento.stackexchange.com/a/14821/2190