I also raised this issue on on the MS forums: http://answers.microsoft.com/en-us/office/forum/office_2013_release-outlook/business-contact-manager-in-outlook-2013-form/ba2bb408-2476-4ffd-a213-64c61ad72e97
(A lengthy description of the behavior can be read on this page)...
I do not agree with the above.
There is no solution to be found on that link.
I am in a similar situation: a customer of mine was using Outlook 2007 with BCM 2007. After upgrading their machines to Outlook2013+BCM x64, the field labels of various objects-buttons on the contact's...