[Varnish] #1063: after installing varnish on our drupal sites, our FB comments posting all broke

[Varnish]

#1063: after installing varnish on our drupal sites, our FB comments posting all
broke
------------------------------+---------------------------------------------
 Reporter:  drupalama         |        Type:  defect 
   Status:  new               |    Priority:  high   
Milestone:                    |   Component:  website
  Version:  3.0.0             |    Severity:  major  
 Keywords:  facebook, drupal  |  
------------------------------+---------------------------------------------
 in IE9, after logging in to FB it's not letting us post comments at all
 (clicking post doesn't do anything)

 in other browsers (Chrome, Firefox) after logging in to FB and trying to
 post FB comment it keeps asking us to re-login again (eventhough we can
 see the user is already logged in)

 in our test sites without varnish, the FB comment post works just fine.

 please comment on this and kindly provide necessary fix.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1063>
Varnish <https://varnish-cache.org/>
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