Hi,
Yep, I ordered mine through amazon also. The problem was cosmetic, yes.... but the corner was completely destroyed. Like a hammer was taken to it.... I have to say, I'm not thrilled with the way the cabinet more or less "crumbled". I mean its not like it splintered it literally crumbled. I hope these sound as good as I've been reading, because the cabinet build quality is definitely suspect in my opinion. It was too damaged to even stand up on its own. I did look inside the gaping opening at the bottom of the speaker cabinet where it was damaged and noticed, for what it's worth, that it can indeed use some polyfill as has been suggested earlier.
On a more positive note, the speaker overall (the good one) looks decent, the grills are well built and mount nicely into the cabinet, the woofers and radiators seem solid and the tweeter is well..... a soft dome tweeter.
Can't do much more with it until the new one arrives. And pray the replacement isn't subject to the same shipping and handling abuse.