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Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
What application are you using to view the images?
Ok, try creating a new account (systempreferences -> accounts or go to Users & Groups) and see if the problem is repeated on the new account.
If it is, then you will need to try re-installing the app. If the problem is not repeated, then it's likely the app is okay and the problem is something wrong with your account.
Did you get another account set up on the computer following my instructions?