This is an odd buglet. Here's exactly what happens:
Start netscape as a foreground process
While the focus is in the window netscape was started from, hit Ctrl-Z
-- Nothing will appear to happen
Change the input focus to the Netscape window
-- 'Suspended' will appear in the xterm/rxvt (from the previous Ctrl-Z)
Now fg/bg/etc. commands will work.
Not necessarily even annoying, but kind of odd. I haven't bothered to
track down why it happens.
-- "Honestly, it's like shooting | Bob Glamm H: +1 612 6239437 W: +1 612 6268981 fish in a barrel. Twice. With | URL: http://www-mount.ee.umn.edu/~glamm an elephant gun. At point +----------------------------------------------- blank range. In the head." -- from the BOFH files, part 6