Originally Posted by LCI_Brian
Yeah, the protector peg broke and the case compressed onto the front wheel and therefore against the rear derailleur.
by "protector peg", do you mean the pvc compression piece with the plastic flanges? I think they call it the "case crush protector"? If this is placed directly adjacent to where the derailleur is, there would have to be an enormous compression force to cause that pvc pipe to deform and collapse.