This just started happening to me too. I am also on Photoshop Elements 11
I tried renaming the Breezesession.dat file but that didn't do it.
The app will now not pickup any new faces for facial recognition.
I really love this program but there are WAY too many bugs with the facial recognition. Picasa is a free app and absolutely shines in this area.
I certainly hope this gets corrected in the upcoming version of Elements.
Any suggestions to correct this would be appreciated.
Erick