Bingo! That's exactly what it is, now that you've circled it. It's something awry with a enhanced lens flare. That would have thrown me too! Nice picture by the way.
Thanks Nick. I wasn't sure about adding the lens flare effect, but thought what the hey.. I took the mandatory moon shot last night, and will post it later today when I get home. Didn't come out half bad. I used f8 - 1/60 settings, white balance on auto, OIS at 2, handheld, manual mode.