Facebook comes from static.ak.facebook.com

[meucat]

Hello , I began yesterday to use those FB "like" buttons in some pages and now I see lot of "come from static.ak.facebook.com/connect/xd_arbiter.php?version=6" in statcounter.

Does anybody know what the meaning of that?, because when pepole normally click your site from facebook the entry has another format (i cant remember now).

It is first time I see these statatic.ak... and they began to appear just some hours after I put the buttons.

thanks