Sometimes there are multiple results for the same item and you can't rely on the poster (or lack of) to determine the correct item. It really should show the actual name, or some other reliable identifier to see at a glance to see what is what. (IMDB# possibly?)
I suggest either an option to show a text overlay, similar to what is there when using the "Logo" option when there is no logo to show. Or maybe just show the overlay on hovering the item so it doesn't otherwise obscure the search results image.
My immediate fix it to look at my browser status bar when I hover the item, but this isn't an option in all interfaces.