You should call Ortlieb USA. I think they'd want to know if they had a QC problem on materials used in the handlebar bag, or an training issue (the guy who pops these snaps in).
You can buy snap fastener kits to repair this bag yourself from hardware and marine stores. Maybe a heavier, larger snap would hold up better. Also, some shoe repair shops will replace snaps.
Thanks for sharing this info. I've been considering buying a U5+ to match the bags for a while now, so maybe I should consider alternatives. The only other nice handlebar bag I know is Arkel, but it's heavier and costs twice as much:
http://www.arkel-od.com/us/all-categ...lebar-bag.html
There are quite a few mediocre handlebar bags available, most look (and likely perform) inferior to the two brands already mentioned. However, I would consider JandD or Lone peak as alternatives.
http://www.jandd.com/detail.asp?PRODUCT_ID=FTOR2
http://www.thetouringstore.com/LONE%...ACK%20PAGE.htm