I have a filter, PTLens http://www.epaperpress.com/ptlens/ , which corrects Barrel-Pincushion distortion in my images.
This relies on extracting EXIF information from the image on the lens used. The filter is quite specific on the lens e.g. I have a Sigma 18-125 lens. The Ptlens filter recognises the lens as "Sigma 18-125 f3.8-5.6 DC OS HSM".
ACR shows the lens as 18-125@18mm.
Organizer > Properties shows the Aperture used and the Focal length.
Can the full lens data be added to Organizer > Properties
See this thread for an ongoing discussion:
http://www.elementsvillage.com/forums/showthread.php?t=47840