As Kelly Bundy would say, "the mind wobbles."
I don't see how it could fail either, and it's not like it is a new design. Isn't it exactly the same lock that's on the SwissTool and AutoTool before that? I am not doubting what this guy has to say, but it certainly does seem odd.
Of course, every company is due a few manufacturing errors here and there, but usually Victorinox's are pretty few and far between.
Def