Tonight, for no apparent reason, a problem has started cropping up when
I 'sudo su'. The root shell will start up fine, but after the first time
I hit a key, the shell terminates - apparently normally. A sample try
looks like this (I begin to type "emerge", with little success):

tim@(protected)
wozniak tim # eexit
tim@(protected) ~ $

This occurs no matter how long I wait before hitting a key. Using 'su'
without the preceding 'sudo' will let me into a normal root shell
without the problem occurring. The problem also occurs only in Konsole,
not at a tty. I should mention, based on this, that I'm running KDE4.
How might I go about fixing this?
--
gentoo-user@(protected)