Did the email signup tab powered by MailChimp on your Facebook fan page disappear?
The source of the problem is that Facebook removed the MailChimp application.
More information from MailChimp support can be found here - Where Has MailChimp’s Facebook App Gone? | MailChimp Email Marketing Blog
The source of the problem is that Facebook removed the MailChimp application.
More information from MailChimp support can be found here - Where Has MailChimp’s Facebook App Gone? | MailChimp Email Marketing Blog