Well, this is one where I don't know how I feel.
I am very much against the practice of forcing widescreen on material that was originally composed for 4:3. (OAR is not just about preserving widescreen.) That also goes for material that may have been protected for 16:9. After all, people are up in arms when a DVD is released open matte. As with open matte, what matters is what it was composed for, not what it was shot in.
Here, I'm just not sure what the OAR is. It may be a case where neither is really "correct."