I also received a new sail this weekend. Went to put it up but the sail kept coming out of the mast. The mast is new and the old sail (a year old) worked fine. It turns out that boltrope is too small. We compared it to a few sails old and new.
This is the second main sail in two years I have rejected. The first one (last year) the batten pockets were too close to the boltrope and the sail would not go up. Not to be negative but I am a little pissed at the quality of the sails as well as other replacement parts.