Thanks for the update! One of my white chicks, a pullet with a crest also has a curled toe which I noticed like a week after I got them. Actualy tried to help her straighten it by making a bunch of cardboard "shoes" and fixing it with medical tape for a week, changing it every day (touching the toe or straightening it didn't bother her at all and didn't seem to hurt her). It did help a little, but really not much. Anyway, she's a happy pullet nonetheless and does everything just as fine as other chicks. Don't worry about it too much.
Read somewhere it might be a vitamin B2 (I believe) deficiency while growing (brewer's yeast has lots of that vitamin) or inappropriate humidity levels while hatching. More experienced members might know more