Just noticed this tonight after installing the latest driver update last night. First time booting into the game, the left eye does not render the game world. Funnily enough, I flicked through the Pixel Density values, and some of them cure the effect. Some of the cause the issue to persist. Off the top of my head, 115%, 120% and 150% all fail to render the left eye. I have Resolution scale set to 100% and SteamVR SS also set to 100% for the G1 res. It's not overloading the headset with pixels because it does it at lower values, too but I cannot remember exactly which ones.
So weird.
So weird.