The emailed 'apology' (which the manager of recruitment didn't even have the decency to send personally) seemed to suggest that it was someone in recruitment who was offended by the advert.
Personally, I think anyone who found it offensive is rather narrow minded and prejudiced.
Certainly didn't offend me - they can write their adverts on the walls of public toilets for all I care, as long as we get the right people through the system.