It is my understanding that Camera Raw Update 7.2 (for both Mac and Windows) only included "preliminary" Nikon D600 support - whatever that means. It is from October 2nd, and here's the link. Make note of the asterisk'd comment
* Please note that the support for Nikon D600 is preliminary and there is a minor risk that the appearance of your images may change when the final support for Nikon D600 is available in an upcoming release.
>Thanks for the responses. I don't know what >"preliminary" means either, as I can't get it to >work with my files. Lesson learned: should have shot in raw >and jpeg this first time with a new camera. > >I hope the upcoming update will solve the problem. > >Surprised I haven't come across more chatter on this issue. >The realization certainly made me have a "WHAT have I >done?" moment. Preliminary support in 7.2 and LR4.2 was for the d600 but did not include camera profiles. These are now available in LR4.3
After much searching and downloading of various things (including a trial of Lightroom that created much panic within, haha), I do believe my problem is solved. Found the Camera Raw 7.2 patch (simply updating from CS 6 did not pull up CR 7.2, only through 7.1.)
Raw seems to work for me now; whew! Now I need to find a new raw file previewer for Windows that is compatible with the D600 files.