Facebook fb_xd_fragment problem has been ongoing for quite a while now. This is a known Facebook bug with the XFBML version of the Like button. It appears that Facebook’s JavaScript SDK code is appending fb_xd_fragment parameter to the request URL, which would result in a blank page.
This is not good, according to SEO experts, as it causes to spread duplicate content across your website which can effect your search traffic and SEO ranking. Besides that, it also creates duplicated pages with ?fb_xd_fragment parameter reports in your analytics platform.
