Bedroom Ghost Picture

Jodie sent us this ghost picture of what she calls "a ghost in my bedroom." Is it a ghost or something explainable? Either way, it is an interesting image:

"I was taking this pic upstairs in my bedroom of my husband for his Myspace (page), and this is what showed up."

To us, it almost looks like a young lady swinging her arms. Is she a spectre or a prankster?