@wyldanimal: Thanks for your help with this. It seems the rebuilding the collection was what I was missing although a few cards had other issues as well. Just need to work out why some of my recent cards are not picking up the picture and just showing black now!

@paulied
To get the cards image back, quit iStripper, go to your Data folder and delete the cache5 sub-folder. Restart iStripper and all should be fine now.