GIMP doesn't start any more in SLED 11 SP-2.
uname -a
Linux alex 3.0.38-0.5-pae #1 SMP Fri Aug 3 09:02:17 UTC 2012 (358029e) i686 i686 i386 GNU/Linux
This is the command line output:
~>gimp

(gimp:4416): GLib-GObject-WARNING **: cannot register existing type `GtkScaleButton'

(gimp:4416): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

(gimp:4416): GLib-GObject-CRITICAL **: g_type_register_static: assertion `parent_type > 0' failed

(gimp:4416): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

(gimp:4416): GLib-GObject-CRITICAL **: g_object_new: assertion `G_TYPE_IS_OBJECT (object_type)' failed

(gimp:4416): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(gimp:4416): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gimp:4416): Gtk-CRITICAL **: gtk_table_attach: assertion `GTK_IS_WIDGET (child)' failed

(gimp:4416): Gtk-CRITICAL **: gtk_widget_show: assertion `GTK_IS_WIDGET (widget)' failed