I too got bit by this bug. The solution, after getting a hint from Deputy Ellen and re-reading these discussions was as simple as removing the trailing spaces on the
X-SpamCop-Conf: 3vKhNZxyzzyXYXXY header.
All the rest of the header and body was a straight paste into the webform.
thanx,
/od55
p.s. I concur: A little coding to trim the lines would go a long way towards making the process a little more user friendly...