Getting back on topic here (well, nearly anyway),
I did find out that a Fire Rainbow (circumhorizon arc) is different in many ways from a Sun Dog (parhelion). Here's some info:

http://www.wrh.noaa.gov/otx/photo_gallery/circumhorizon.php

Wow! Thanks B-Two. You must catch the Mercury transit of the sun on Nov. 8th. at 2:15 p.m. Whatever you do, get to a telescope with the proper filter for solar viewing, you won't regret it.

The sun hurts my eyes, so maybe I'll watch it at night.