When logging out metacity sometimes whines about windows that will not have their state stored. When 'Save current setup' isn't used, this warning seems very unnecessary and plain annoying. This is supposed to be removed when not saving sessions, but not when using the Ctrl+Alt+Del "backdoor". I was told this is a distro specific addition so I'm filing the bug here.
The dialog in that case is displayed by gnome-session.
I agree the dialog is annoying. It actually comes from metacity I think (the session manager only knows about apps that *do* support saving sessions, not the ones that don't). In any case we don't have the distro-specific backdoor anymore, so it's a bit moot. closing...