iPhoto problems saying "!"

Hello All,

I have recently put up some photo's on iPhoto from my new SLR camera. At first i could view them all like normal, but lately all of the landscape shots come up with an ! in a circle. Note that all the portrait shots I can still view.

The photo's are still visible in the folder, but I just cant view them singly. I also cant move them to the desktop.

What has happened??

Bolts100no

Usually this is iPhoto trying to tell you that the photos in question have been moved or are no longer available. You could try re-importing the pictures from your camera, or restore them using your Time Machine backup.