[xmonad] Wrong desktop on session restore

When you start a KDE/xmonad session, KDE's session manager restarts applications whose state was saved when the previous session was closed. But under xmonad, these restarted applications open on the wrong desktops. This sometimes creates quite a mess. This seems to be yet another symptom of xmonad and KDE not cooperating about multiple desktops, as illustrated by the fact that things go awry when the number of desktops is set greater than one in KDE. Is this also a problem on Gnome or Xfce? Is there any way to get xmonad and KDE to agree with each other about multiple desktops? Thanks, Yitz