Lesson of the day: Never forget to CHMOD 644 config files after installing and setting up a script.
I think I forgotten to change my wp-config.php file from 777 to 664 and some lovely script kiddies thought it would be fun to replace it with some of their own text. Just spent the past 30 mins repairing the damage.
Oh and keep backups. Hosts seem to keep one day backups. I only blame myself