XF 1.2 Facebook xd_arbiter.php sourced from 2 different places?

[Stuart Wright]

Google pagespeed says about our forum list

The following resources have identical contents, but are served from different URLs. Serve these resources from a consistent URL to save 1 request(s) and 26.1KiB.

• http://static.ak.facebook.com/connect/xd_arbiter.php?version=27
• https://s-static.ak.facebook.com/connect/xd_arbiter.php?version=27

Is this something we can optimise?

 

[Mike]

That's coming from the Facebook JS SDK. Nothing you can do.

 

[Stuart Wright]

Hmmm. You should get Scott on it, Mike. Thanks
The other thing page speed suggested was to defer some .js loads. Most were from addons. Any suggestions there?