10-24 DX, loose lens mount
This is more of a warning to others than a complaint.
Recently I discovered that my 10-24 DX lens felt loose and sloppy. Today I decided to check the screws that hold the mount bracket to the lens barrel. 3 out of the 4 screws were loose, so no wonder the lens was sloppy. After tightening the screws it felt nice and tight again.
Of course I looked at all of my other lenses. All, the 70-200 F2.8 VR II, 24-120 F4 VR, 105 F2.8 VR and 50 1.8 were all nice and tight.