I've installed Mint 14 Cinnamon onto my kids computer. I've got the logon manager set up to select the theme where you can see the icon for each person.
How do you do a custom icon for each person? The only one I can get to work correctly is my own. The other accounts continue to show the default icon image.
I created the png file with a max of 64, then saved it as ".face" (no quotes) into the /home of each user.
Each user now has thier face saved as .face, but mine is the only one that works.
The only thing I can see that is different is that I'm the admin, rest of the acounts are users.