--- dhclient.c.orig	2010-11-02 00:47:55.000000000 +0200
+++ dhclient.c	2010-11-02 00:47:55.000000000 +0200
@@ -727,7 +727,7 @@
 	make_request(client->active);
 	client->xid = client->packet.xid;
 
-	if (client->active->options[DHO_DHCP_SERVER_IDENTIFIER].len == 4) {
+       #
+       # Without disabling this there may be problems with multiple interfaces
+       # running DHCP clients towards the same ISP. Try if you don't believe.
+       #
+	if (0 && client->active->options[DHO_DHCP_SERVER_IDENTIFIER].len == 4) {
 		memcpy(client->destination.iabuf,
 		    client->active->options[DHO_DHCP_SERVER_IDENTIFIER].data,
 		    4);