Just a quick vid I put together on some things I've noticed while doing maintenance on the o-ring /threads. Also quickly covered the changes vs. v1.11 as well as tint discussion:
Yup, you don't want any o-ring's binding at all, plus the grease will help fill the tiny pores on the underside as well thus potentially improving water resistance to boot.
Mine came with a black o-ring and have not had any problems. Good lubrication is important. If your o-ring is silicone, I've been told that silicone grease may damage it and cause it to swell. If your o-ring is rubber, petroleum products will make it swell. Pick your lubricant carefully. Nice video! A+++ If you've not read this you'll find it helpful: http://www.candlepowerforums.com/vb/showthread.php?242414-Comprehensive-Grease-and-Lube-Thread