Hi,
You dont have to set the field to required if there´s only one image defined, but otherwise indeed you have to set the field to required. I dont think thats what it should do....
Also, when you show an image in the search results of a list )list management', you dont see the image and also you cannot link to the image..... It is said that only the avatar works fine in this release, I hope RC3 is meanth and not the final stable release...
So, I dont have a solution but i will post it if i find something.