Thank you Team D for the great work. I also have a triple monitor setup. When I started up the game for the first time, I was able to select resolutions from the menu, but could not actually implement it in game.
When I set up my triple setup via editing the conf.ini, I was able to get triple monitor resolutions working, and I have to say, it sure is sweet not needing to use a 3rd party program that doesn't always work (big thanks to San for his widescreen fix, but it is problematic).
Of course, the menus are stretched out, but you can't beat the immersion from a triple head setup. I will see if others are posting solutions or perhaps create a thread devoted to tweaking triple monitor setups with the latest patch. S! and thanks again for the great work!