i believe the instruction recommend users to recalibrate your kinect. The lens adjust its depth sensors.

it seems like the lens installed are the wrong deg optics. check back the instructions.

i could say it more to installing additional lens to a camera. like any camera zoom lens, the distance between cameras lens and the zoom lens are constant.

so the probable solution:
1. lighting - avoid direct light to the kinect to prevent glare.
2. position of the camera - also to reduce glare
3. zoom lens are not completely attached to the kinect
4. dirty lens

i think its a wize idea to contact PA and ask for an advice. (i m pretty sure its broken)

i dont think is a gimmick. it probably factory defect. the lens are sensitive things.

I think it's the first batch defect issue. And the nyko manual aint any helpful

possibly its the sticker that supposedly to be installed to kinect wasnt done properly or faulty.

its more to quality control