This might be useful:

http://www.ovalnews.com/2010/11/tech-artic...rover.html

Most fix this by drilling a little hole near the bottom  .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Not sure about the headlights but I definitely think rainwater gets into the rear lights by way of an inadequately made joint along the top edge. LR don't seem to mention this leakage.
Condensation in the lights is exactly as LR describe.
If your car is under warranty it seems all you have to do is pour a small amount of water into the lights by the vent tubes and you get your lights replaced by LR.