Xscreensaver activated with switching back to original user

[Lars Noodén]

When I switch users and then log out of the second user I get the login
screen, as expected.  Then when I enter the login credentials for the
first user, the next thing I am greeted with is Xscreensaver's login.
So I actually need to log in twice, in two different ways, to get back
to the original session.  I would expect that the login screen should
get me fully back to my original desktop without needing to enter the
password a second time at the Xscreensaver.

This happens even if I am only out of the original user's desktop for a
few seconds.

/Lars