CracksThe cracks are in the plastic that surrounds the calf, on the back of the liner. It is very odd as this does not seem like a high stress area. Again, I think they may have been there from purchase, but I did not notice. I figure replacements would be easier than trying to warranty them, if they could be purchased at a reasonable price.
Oh, my main concern is that the plastic will eventually start to break apart, rendering the liner useless/uncomfortable. For now, the boots are still skiable.