In the interest of full disclosure, I found some other small dings in the cab today as I was looking it over.
Here is a pic of the tear in the tolex on the bottom of the cab that I original reported:
This is another really small tear, may 1/4" that is on the front bottom edge:
There is a slight scuff mark on the top of the cab here my rack rubbed it:
And lastly, a tear on the back side about 12" from the bottom: