Nice to see you're still around:) I've done a little synthing, and a lot of showing (doing presentation this month for travel-centric photog group I started in CouchSurfhing), but haven't had a need for help. But, here I am now!:)
Tnx. Yes, I found those two links, as well. I don't see "FocalLengthIn35mmFilm" in my EXIF. Just Googled. It's a TIF tag. And it's different than the "Focal length" datum. Even if I had an equivalent, I'd have to read the FL, do the math, and write the result. Of course, this might be cam depend. Perhaps somebody has already done this(?)
Of course, I'm not even sure if the 'ccd width' is the problem. I will have to do some testing. There was a somewhat dense 3D 'crowd,' which might have affected the synther. I just don't know. I've bee looking at house examples, etc. Anyhow, the "good" news is that the distortion is not apparent when navigating the 3D photo space.
I let you know if I come up with anything...