I was dking last night, and got a fremenik helm drop, and i remember seeing it in the summoning guide. I kept it, just so i could see if it would look cool enough for a skilling outfit if i got it enchanted. I i go to the summon guy, ask him to enchant my helmet, and he says "sorry, none of your helmets can hold summoning scrolls." It a gray, fremenik helm, no horns or anything, and the summoning guide says you need 35 summon and 45 def to enchant it. I am pretty close to doubling both the requirements, so there is no way its that. So, is this a bug, or am i just missing something.

"Fremenik Helm" refers to the Archer Helm, Berserker Helm, Warrior Helm, and Farseer Helm which are available after the Fremenik trails quest. I dont' think you can enchant one without horns.