I have just noticed a wear patch(hole)on my 13m kite, where the zipper is for the main bladder. I have also noticed slight wear marks on my 9m.
The problem is the main body of the zip pops up through the protection flaps. Well its the problem with mine so you may just want to check yours is ok.
Had exactly the same problem with my 13. I've put stickyback (colour matched)on both sides of the canopy in that spot. The abrasion actually occurs for me when the kite is packed. When rolled up the zipper always sits on the same spot against the canopy. Must have a look at my 9 which I've hardly used. Probably a good thing for Best to address on the 08 models. Other than that, Im luuuuvin these kites !