diff -ur netcfg.orig/netcfg-common.c netcfg/netcfg-common.c
--- netcfg.orig/netcfg-common.c	2007-06-17 12:10:49.000000000 +0200
+++ netcfg/netcfg-common.c	2007-11-07 11:24:19.000000000 +0100
@@ -610,6 +610,7 @@
             domain = strdup(s + 1);
             debconf_set(client, "netcfg/get_domain", domain);
             have_domain = 1;
+	    *s='\0';
         }
     }
     return 0;