Mission Concepcion Ghost Picture

Nikki Gilday of San Antonio, Texas sent this different picture containing a green orb:

"This picture was taken on Sunday, November 02, 2003, 2:41:56 PM at the historic Mission Concepcion in San Antonio, Texas. It was very clear and sunny that afternoon. I was standing in the shade, and the entire image I was trying to photograph was also in the shade, so this is not sun glare. This orb was not visible when I took the photo with my digital camera, nor does it appear in the pictures before or after this one, so I know it's not a dirty lens. When I downloaded the pictures to the computer, this is what I found. Out of about 300 pictures, this is the most noticeable of the orbs. I have had this untouched image on my computer screen, and had people walk into the room and their eyes are instantly drawn to the green orb. Very odd."