Which version of Lightroom?
CR2 files from which Canon camera?
Lightroom 5 (downloaded last week) Canon G16. Spoke to a LR user friend: however, could you please verify a thought, when I open a C2R raw file (canon G16) it appears to be a 4:3 image, which could be the CMOS image and if I "crop as shot", then I get a 16:9 crop box (which was as shot). Maybe LR is displaying the CMOS 4:3 image and the Canon software just superimposes a 16:9 frame "as shot" on the 4:3 CMOS image but LR leaves the aspect up to user
Thanks very much
So what is your question, or are things resolved in your mind, now?