I create IPTC metadata in Lightroomn 2 anc check to see if it can be read outside LR by using Xee. (Yes, I AM paranoid). Everything is there EXCEPT "Date Created" under the "Image" subheading of IPTC. This is important since I have about 10k scanned images, and the EXIF data shown is the date scanned, not the date the photo was taken.

Xee version 2.1.1 on OS X 10.6.4