since when did alt-shift-tab quit working?

[Steve Franks]

I thought it was the kludged state of my desktop, but the 8-release
server I just brought up fresh yesterday is doing it too: alt-tab
works, alt-shift-tab does not.  For those of us who are not into
gnome/kde/cutesy menus & panels, this is a major PITA.  No doubt it
came in from linux-land with the latest xorg revision, and I'm going
to have to add another esoteric knob to my xorg.conf...

Steve