facebook javascript sdk fb_xd_fragment?

Question

I am using the facebook javascript sdk to embed a like button in my page.

What is fb_xd_fragment? I see it appends to the end of my url like http://www.example.com/c

Answer 1

Although the answer above from github seems like an answer to another question, it does work well. UPDATE: link is broken - try http://blog.colnect.com/2010/10/fbxdfragment-bug-workaround.html