Sample URL: http://vostimonial.com/wp/roots
Tested and works on: Desktop, iPhone 3G IOS 5, Android 4
Does not work on Windows Phone 7.5 Lumia 800 IE, SurfCube
Even though Windows Phone user base is not very large, I must support this platform.
Unlike on Android, where an in-page DIV pops up or iPhone, where a tab pops up, on Windows Phone the user is taken to a m.facebook.com page replacing the page they were on originally.
After I click login with correct credentials, the screen attempts to redirect me back to the original page, but ends up on a white screen. The redirect never completes. I can see the original URL to which it is trying to redirect in the URL string.
The exact URL is
Switching user agent did not appear to help.
This seems to be a hint: https://developers.facebook.com/docs/reference/dialogs/#display
I tried setting the display parameter in base_facebook.php but it didn't result in visible changes.
I can confirm that the app shows up under my http://www.facebook.com/settings?tab=applications when I authenticate on Windows Phone after deleting its previous credentials at that URL.