Yes, same issue also.
To give more information: the site’s at privatesecretdiary.com, and is appearing fine. The admin area’s at privatesecretdiary.sexandbowlsandrockandroll.com/wp-admin, with the option under ‘settings’ set to show the site at privatesecretdiary.com. (Forgive me – can’t remember the exact option, and can’t look it up!)
It was working fine then just stopped overnight. WordPress seems to be looking for the admin area under privatesecretdiary.com/wp-admin rather than the original domain.
Being a complete newb, I can’t tell whether this is a hosting issue or a wordpress issue. Any ideas, anyone?