Aye, there are the dents. Unavoidable once you have transformed the legs. It puts a lot of pressure on that part. Especially once you see how the legs "lock" in place in robot mode.

I'm not too fussed. I'm not a MISB collector and I'd rather worn loved toys than staring at boxes of plastic.

I guess it's a QC issue that got overlooked during prototyping? Or perhaps the prototype plastic probably was stronger and not the clear plastic used for that portion.