Cracks around MicroUSB port?

[TotalLamer]

Anyone else get this? I bought a used 1520.3 from B&H and I'm not sure if it came this way or just appeared but there's a small hairline crack in the case that starts from the MicroUSB port. Is this a common issue with the 1520?

 

[Scienceguy Labs]

Anyone else get this? I bought a used 1520.3 from B&H and I'm not sure if it came this way or just appeared but there's a small hairline crack in the case that starts from the MicroUSB port. Is this a common issue with the 1520?

I've had three 1520s, and I've never had that issue. Can you post a picture? Most likely, and especially if the crack is on the thinner, screen side, a crack like that could happen if the phone were quickly picked up while still connected to the USB cable charging. If the micro USB connector where violently pulled out in such a way that applied pressure to the thin part of the phone's frame, I could see how a crack night form.
Just my hypothesis.