Linus Law
"Linus' Law according to Eric S. Raymond states that "given enough eyeballs, all bugs are shallow". More formally: "Given a large enough beta-tester and co-developer base, almost every problem will be characterized quickly and the fix obvious to someone." The rule was formulated and named by Eric S. Raymond in his essay "The Cathedral and the Bazaar".
More at the Wikipedia article at http://en.wikipedia.org/wiki/Linus's_law