Version: (using KDE 4.1.2) Installed from: Gentoo Packages I use Super + mouse wheel over the client area of a window to move it to next/previous desktop. With the Desktop Grid effect active, the window I am "taking with me" flies off the screen and then flies onto the screen from the other side as I arrive on the next/previous desktop. It ought to stay in place while the rest of the windows slide (except any windows set to be on all desktops, of course).
DesktopGrid needs to also take into effect Worspace::movingClient somehow.
*** This bug has been marked as a duplicate of bug 213847 ***