Confirmed for Emacs 24.2 (compiled from vanilla source, using GTK3), Ubuntu 12.10, Unity.
This bug is likely related to bug 941790, but that bug is about rows shrinking instead of cols, like in this case. Emacs emits the following GTK-warning when ediff window pops up: (emacs:8955): Gtk-WARNING **: gtk_window_parse_geometry() called on a window with no visible children; the window should be set up before gtk_window_parse_geometry() is called. -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1059633 Title: Emacs 'Ediff' Window Shrinks Horizontally To One Column Wide To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1059633/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp