Note to big companies hoping to tap into France's lucrative but long-neglected Muslim consumer market: Pitfalls may await, and not only in the form of complaints from the far-right.As of this week, 22 outlets of popular French fast food chain Quick are serving burgers it says respect Islamic dietary law. And while many Muslims are delighted, the powerful main Paris Mosque complained Thursday that Quick's criteria aren't all-encompassing enough, and that the operation is meaningless.