At first, I thought this was a flaw in PhotoBooth, because while it is good to see myself as in a mirror to prepare for a picture, once I get the picture, I want it to look like a normal picture. When I looked at PhotoBooth’s menus, however, I found that the Apple engineers had thought of that as well. Not only can you flip pictures once they have been taken, but you can set PhotoBooth to auto-flip pictures when they are taken.”

Tom: under the edit menu is an option to autoflip images when taken.