Steve,
I had the big toe just touching the toe box to the point that after several days on the trail the nail was killed. Not too painful as each contact was so slight. The cure was a set of slip-in SUPERfeet slip-in arch supports. The theory being that as you shall we say "age" your arch drops a bit causing the toes to extend forward as the weight comes down on your foot. The higher arch of the insert keeps the bottom of the foot curved thus reducing the forward thrust of the toes, mainly the big one.
I have not had a bit of foot trouble this year since using these supports.
http://www.onlineshoes.com/mens-superfeet-green-premium-insole-green-p_id95859
