Hi, first post and I've searched the net and can't find an answer to
my problem...  I have the 7D (obviously) but I've noticed that lately
there's a vertical white bar that appears on my photos.  It's about
2/3s across the shot (left to right) and fairly thin but def
noticeable.  More noticeable in dark areas on the shot.
I've put a shot here - 
http://www.selwood.me/?page_id=280 so you can
see what I'm talking about.
Anybody else had this happen to them?