"you grant Facebook “a non-exclusive, transferable, sub-licensable, royalty-free, worldwide license to use any [IP] content that you post on or in connection with Facebook (“IP License”)."
But who's the "You"? The person uploading? They didn't have the right to put it up, but I don't think FB's gonna split hairs if they want to use the image.
I haven't uploaded to FB since they implemented these rights - only links to other sites showing my work to protect myself - but I can't protect myself from this sort of thing.