Hmm strangely I just noticed that this problem has resurfaced. I have people/share/print enabled on the skin (as I showed in the first post), but face tags created via WIndows Photo Gallery are not showing the people button anymore. This had worked for a while, so Im not sure if its a change in the skin or maybe something changed in the underlying javascript library again. Photos and links are all the same as previously stated.

I just noticed as well that my face regions exported from Adobe Lightroom no longer appear in the lightbox. The region metadata is there in data1.json and the regions are displayed in jAlbum's region editor. I backtracked through previous versions of Tiger that I had on hand to see when it might have broken. I can say that the regions display fine in Tiger 2.6.2 and do not display in v2.7.1. So something broke between those versions. For now, I am reverting to 2.6.2 and rebuilding all my albums.