Last week my Incipio Feather case cracked in the upper right hand corner. This was due to my many battery pulls. I contacted Incipio and they notified me that they were redesigning the Feather cases and will ship me on free of charge in a couple weeks. All that I had to do was email email@example.com.
Make sure you include a statement about your problem, your previous order number (It is under your account information at Cases and Accessories - iPhone, iPod, Zune, BlackBerry Cases and Accessories by Incipio), shipping address (Which is where you want the free cases shipped ;P ) and make sure you attach photos of the cracked area of your case.
It was so simple! They sent me a free Incipio dermaSHOT case to use until the redesigned Feather is finished. Amazing service! I hope this helps some of you out. :beerchug: