这可能如果没有主电子邮件地址，该用户发生。受影响的用户必须删除的电子邮件，保存设置，然后重新添加地址，再确认，然后使它的主。为什么这个工程上的其他网站，如IMDB原因可能由事实来解释，本网站不要求电子邮件地址是从FB返回。它只是使用提供的任何信息。

This could happen if there's no primary email address for this user. The affected user must remove the email, save settings, then re-add the address, re-confirm, then make it primary. The reason why this works on other sites such as IMDB could be explained by the fact that this site doesn't require the email address to be returned from FB. It just uses whatever information is provided.