I just upgraded an application on my iMac and for reasons that the developer cannot explain, it downloaded almost 3000 library images into iPhoto. Of course, I did not think, and now discover they have all been loaded to my iPad 3 and iPhone 4 via Photostream. I am now faced with the task of removing 3000 images from all three devices. Any advice on a quick way to do this would be most appreciated. Thanks.