OK, we've been trying to log in to Facebook using the various tutorials, and we're having the same problem no matter what we try.
The problem is that once we log in, where we should get the "Request For Permissions" dialog, we get a blank window.
We started with this:
Then we tried this video:
Then we tried to various pre-made samples.
This makes us think that maybe there's a setting in Facebook we're missing. We've created a bunch of Facebook apps with different settings, and we always get the same blank screen after a successful login. This is a screen shot of what's supposed to appear:
Instead, just the title with nothing in the window.
Having exactly the same problem. "Request For Permissions" dialog is blank. The buttons are there, but they are invisible.