Description of problem: enter not accepted in unlock screeen anymore, it requires clicking on the unlock button Version-Release number of selected component (if applicable): gnome-shell-3.7.91-1.fc19.x86_64
Should be fixed in the next update.
I can't even enter a password to authenticate.
Jens: that's a different bug, please file separately.
This is fixed in latest F19 updates for me.