I can confirm this bug. 32-bit Ubuntu 8.10.
$ synfigstudio
synfig studio -- starting up application...
(synfigstudio:7758): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
(synfigstudio:7758): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated Segmentation fault
I can confirm this bug. 32-bit Ubuntu 8.10.
$ synfigstudio
synfig studio -- starting up application...
(synfigstudio: 7758): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
(synfigstudio: 7758): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
Segmentation fault