How to remove black "blocked plug-in" window that opens with iPhoto and covers everything under it?

How to remove black "blocked plug-in" window that opens with iPhoto. It covers iPhoto and everything under it. I've right and left clicked the black window, restarting the computer, shutting down the computer, but the window always appears when I open iPhoto and it will not move or go away. It stays on my screen (covering my desktop icons) even after I quit iPhoto. How can I get it off my screen?