It is indeed starting to happen with my tenor case in one spot. The case is about 3 years old. It has not effected my alto case, yet (apparently).
I assumed this was an issue of my tenor case having the glue applied in an improper manner, and was unaware that this is an issue with the brand in general. Had I known that, I certainly would have added a caveat - sorry.
I am still happy with my case choice, though, as it saved my alto from a drummer knocking it off a table onto a concreted floor.... (insert drummer joke here).