GOOD:
https://www.facebook.com/dialog/permissions.request?api_key=189526654399778
&app_id=189526654399778
&display=popup
&fbconnect=1
&locale=en_US
&next=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%3Fversion%3D3%23cb%3Df2e17a539291cf8%26origin%3Dhttp%253A%252F%252Fpepsicowin.com%252Ff13c26e6d5f17%26relation%3Dopener%26transport%3Dpostmessage%26frame%3Df3cc887c751b80e%26result%3D%2522xxRESULTTOKENxx%2522
&perms=email
&return_session=1
&sdk=joey
&session_version=3

BAD:
https://www.facebook.com/dialog/permissions.request?api_key=189526654399778
&app_id=189526654399778
&display=popup
&fbconnect=1
&locale=en_US
&next=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%3Fversion%3D3%23cb%3Df29faf1dd86a156%26origin%3Dhttp%253A%252F%252Fyankee.sierrabravo.net%252Ff1c832336d0a742%26relation%3Dopener%26transport%3Dpostmessage%26frame%3Dfd7ca95bd97676%26result%3D%2522xxRESULTTOKENxx%2522
&perms=email
&return_session=1
&sdk=joey
&session_version=3