I am using the latest iPhoto '11, v 9.3. Just upgraded to Lion. I had to "upgrade" my library that has worked fine under Snow Leopard. After the upgrade, a large number of photos (not all) lost Faces identification that was there before. Further, the Add a face... button is greyed out. This means I am unable to add a Faces recognition of the people in the photo. Please help.
Thanks in advance. Tom
iMac 20" 2.66 ghz Intel Core 2 Duo, Mac OS X (10.5.8), 4 GB memory, 230 GB hard drive