Daughter's Moving Orb Picture

Monique Saulnier sent us this ghost picture with a moving orb in front of her daughter.

"...my daughter and her friend were playing around with their digital cameras on January 7, 2006. The pictures before and after that were taken are fine, and do not have that light - it was just that one. Please help us find out what is in the picture, or who can give us an explanation."