I just had a close look under the loupe, Peck, and you are, to a certain extent, right.  Though not as much right as the photos I have posted here might suggest, I can see what you mean.  Perhaps the slabber was eating a particularly flaky pasty, or rolling a cigarette with particularly old tobacco, at the time it was sealed.  Phew, my confidence in them is restored!  A bit of magic mushroom pizza or smome good weed maybe