Upgrade affected WordPress backend CSS

Hi there, the update has affected the WordPress CSS in the backend. E.g links are not green and the background image is the same as the frontend of the site.

Here is a snapshot of the backend and the site link.

http://www.stepaheadtennis.co.za/
http://www.stepaheadtennis.co.za/wp-content/uploads/2013/08/Screen-Shot-2013-08-19-at-2.27.48-PM.png

Thanks

http://wordpress.org/plugins/nextgen-gallery/