No taskbar entry for kmail

[Jeffrey Barish]

I used to have an entry in the taskbar that indicated whether or not kmail 
had any unread messages.  It has disappeared.  Under Settings | Configure 
Notifications, "Mark taskbar entry" is checked.  I tried restarting kontact.  
I tried running kmail by itself.  I tried rebooting.  I tried reinstalling 
kmail.  Any idea how to get the indicator back?
-- 
Jeffrey Barish