I think this problem has been present since the iPad 2 (believe it or not- fact check if possible): the flash in Photo Booth is not synced with the photo when using the front facing camera. The feature works on the Mac and I guess when they tried to import it to the iPad they didn't time the flash correctly. It's not a big deal but I cant't believe that they haven't fixed this in 3 years. Can a beta tester check if it's fixed in iOS 8. If not, submit a bug report?