Welcome to Android Central! It sounds more like a glitch in the system. Does she have a usable Camera app on the phone?
Try wiping the cache partition, which won't erase any personal data:
http://forums.androidcentral.com/sam...2-s3-tab2.html.
If that doesn't help, go to the App Manager, select TouchWiz Home (or it might be something else, like Homescreen, Launcher, or just plain TouchWiz), and Clear Cache/Clear Data. This will wipe the homescreens and reset them back to a clean slate, so you'll have to set them back up again with your shortcuts and widgets.