This is due to the metacity change from http://bugzilla.gnome.org/show_bug.cgi?id=335524; however the fault lies in gparted for setting its dialogs to be transient on a non-toplevel window. I'm trying to work out how to avoid this in the case of a GtkPlug now.
-- [EDGY]On applying manual partition changes at installation, confirmation dialog appears behind main window. https://launchpad.net/bugs/54474 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs