diff -up system-config-printer-1.1.16/system-config-printer.py.serial-widgets system-config-printer-1.1.16/system-config-printer.py
--- system-config-printer-1.1.16/system-config-printer.py.serial-widgets	2010-01-18 17:01:04.326559283 +0000
+++ system-config-printer-1.1.16/system-config-printer.py	2010-01-18 17:01:24.700559444 +0000
@@ -5949,6 +5949,9 @@ class NewPrinterGUI(GtkGUI):
                                     break
                                 iter = model.iter_next(iter)
                                 nr += 1
+
+                            if not iter:
+                                widget.set_active (0)
                         else: # use optionvalues
                             nr = optionvalues.index(
                                 option_dict[name])