Andrew, it certainly looks like it. Check out the first image with that feature on it at
http://sohowww.nascom.nasa.gov/data/...12_0142_c3.gif taken at 1:42 UT.
It is a very prominent feature in that first image. I looked at the one before (20070112_0042_c3.gif) (00:42 UT) to see if it was there, but I can only see it in my imagination. It would be good to see an image at 1:18 UT, but there isn't one listed on the list of recent images at
http://sohowww.nascom.nasa.gov/data/...altime-c3.html .
Noel