To reproduce: Install lucid-amd64-server.iso, install virtualbox-ose-qt, run virtualbox, click new.
$ virtualbox Qt WARNING: QGtkStyle was unable to detect the current GTK+ theme.
(process:3655): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.24.1/gobject/gtype.c:2706: You forgot to call g_type_init()
(process:3655): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
(process:3655): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion `G_TYPE_IS_INSTANTIATABLE (instance_type)' failed
(process:3655): Gtk-CRITICAL **: gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed
Installing gconf-editor fixed the problem. (I guess this package is installed by default in a desktop ISO, hence the problem only occurs in a server install)
To reproduce: Install lucid-amd64- server. iso, install virtualbox-ose-qt, run virtualbox, click new.
$ virtualbox
Qt WARNING: QGtkStyle was unable to detect the current GTK+ theme.
(process:3655): GLib-GObject- CRITICAL **: /build/ buildd/ glib2.0- 2.24.1/ gobject/ gtype.c: 2706: You forgot to call g_type_init()
(process:3655): GLib-CRITICAL **: g_once_init_leave: assertion `initialization _value != 0' failed
(process:3655): GLib-GObject- CRITICAL **: /build/ buildd/ glib2.0- 2.24.1/ gobject/ gtype.c: 2706: You forgot to call g_type_init()
(process:3655): GLib-GObject- CRITICAL **: /build/ buildd/ glib2.0- 2.24.1/ gobject/ gtype.c: 2706: You forgot to call g_type_init()
(process:3655): GLib-GObject- CRITICAL **: /build/ buildd/ glib2.0- 2.24.1/ gobject/ gtype.c: 2706: You forgot to call g_type_init()
(process:3655): GLib-GObject- CRITICAL **: g_type_ add_interface_ static: assertion `G_TYPE_ IS_INSTANTIATAB LE (instance_type)' failed
(process:3655): GLib-GObject- CRITICAL **: /build/ buildd/ glib2.0- 2.24.1/ gobject/ gtype.c: 2706: You forgot to call g_type_init()
(process:3655): GLib-GObject- CRITICAL **: g_type_ add_interface_ static: assertion `G_TYPE_ IS_INSTANTIATAB LE (instance_type)' failed
(process:3655): Gtk-CRITICAL **: gtk_widget_ style_get: assertion `GTK_IS_WIDGET (widget)' failed
Installing gconf-editor fixed the problem. (I guess this package is installed by default in a desktop ISO, hence the problem only occurs in a server install)