This is the translation I received from http://www.dchome.net/viewthread.php?tid=884925. The member garfieldobx found that when he does the following:
1. Keep the lens cap covered
2. Lens zoom at around 55mm / 8sec / f/8 / iso800
3. Use a FX camera (DX camera will not have this problem)
4. Use flash light to hit the "distance scale" window
There will be "Leak of Light" from the left upper corner of the pic through the "distance scale window".
Please chcek the below URL for the photos: http://www.dchome.net/viewthread.php?tid=884925&page=1#pid10411350
He also tried 2 pieces of 24-70 in Nikon CS and also found the same problem. He did send the lens for repair. He have got the lens repaired recently and the problem mentioned on the repair slip from Nikon HK is "examine the distance scale window".
This member, 98C52, also faces the same problem, and the pic: http://www.dchome.net/viewthread.php?tid=884925&page=1#pid10413989
Same problem was found for the members, sandwich, gitzo, ronnyvaio, fowen, BarryLKS & STEVENKWOK, but no pic provided.
Some members also allged that using torch instead of flash light, or using ND400 instead of closing the lens cap will also find this problem.
Surely, some members did not found such problem so I think not every lens should have such kind of problem.
Has anyone experienced similar problem (I do not own that lens)?