App Store Facebook share 4s bug

I was wondering, has anyone noticed this before?

On a 4s which is not signed into Facebook, view an app - any app - in the App Store.

Tap the sharing button on the top navigation bar.

Select Facebook

An alert box flashes up saying you are not logged into Facebook, but immediately after, the "post to facebook" window in the background gets keyboard focus, the keyboard appears, but the alert message is still there.

The keyboard pops up and obscures the OK button on the alert dialogue. You can now not clear the alert dialogue, can not close the keyboard, and can not cancel the Facebook comment window either. You're stuck and have to quit the app to be able to do anything.

As per below: