Please describe the problem:
The action that places a window on a specific corner of the screen is broken: The window jumps back to its previous location on various actions, e.g., if you maximize and then unmaximize it.

Steps to reproduce:
1. Set a keybinding for an action like handle_move_to_corner_se (e.g., using gconf-editor : apps > metacity > window_keybindings > move_to_corner_se)
2. Pick a window that is not already on south-east corner. Apply the keybinding to put on that corner
3. Now do something, like, maximize followed by unmaximize.
4. Blame handle_move_to_corner_backend if the window is not on the south-east corner.


Actual results:
The window jumps back to its previous location.

Expected results:
to remain at the corner.

Does this happen every time?
yes.

Other information:
handle_move_to_corner_backend seems to be broken. Moving a window by other means, like Alt-drag, Alt-F7, ... behave correctly.