* ./plugins/gtk/gtk_callbacks.c: fixed a segfault when switching to
    fullscreen from the popup menu.
(from v0_4_1_branch)
  * ./plugins/gtk/gnome_callbacks.c: fixed a crash when activating preferences
    from the popup menu.
  * ./plugins/gtk/gnome.glade: added lines this #@%$! Glade had munched, fixes
    a segfault in the Gnome popup menu when toggling the interface.