Well, if you generalize the statement enough, indeed it's the same class of issue. In the situation you described: * you have a fairly easy way to detect the

Well, if you generalize the statement enough, indeed it's the same class of issue. In the situation you described: * you have a fairly easy way to detect the problem * the interns still have plausible deniability as to whether they intended to leave a defect or not The discussed problem with unicode is clearly meant to be used as an exploit, its likelihood of occurring by accident seems very close to zero.