I don't know what to say, other than that the helmet does look odd because it was drawn seperately and it had a different shape previously. I really hope there's some way I can show you that I just made this up... I could do a step by step or something of a new one.
I guess maybe I should take this as a compliment or something? :-p
EDIT: Also, there are those odd white chunks on his neck and hair and helmet and what have you because I have been changing the background while I work on him. When I finally create the real background, I'll fit his edges in much more nicely.
uhm...doesnt look at all to me like it's from another image..stuff like this is fairly easy to do with dodge burn.
Dont get too caught up in conspiracy theories please