Ubuntu switch user & screen lock

[Bill Mills-Curran]

I'm running Ubuntu Feisty Fawn.

I've recently used the "switch user" option to log in without logging
my son out.  However, after logging out of my account, the screen is
locked for my son, and his login password will not unlock the screen.

Anyone else seen this?

TiA,
Bill

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.