* fixes preference handling
* fixes custom client IDs
                        cand.preference -= 2000;
                } else if (otype == DHCPV6_OPT_PREF && olen >= 1 &&
                                cand.preference >= 0) {
-                       cand.preference = odata[1];
+                       cand.preference = odata[0];
                } else if (otype == DHCPV6_OPT_RECONF_ACCEPT) {
                        cand.wants_reconfigure = true;
                } else if (otype == DHCPV6_OPT_IA_PD && request_prefix) {
 
                                buf[0] = 0;
                                buf[1] = DHCPV6_OPT_CLIENTID;
                                buf[2] = 0;
-                               buf[4] = l;
+                               buf[3] = l;
                                odhcp6c_add_state(STATE_CLIENT_ID, buf, l + 4);
                        } else {
                                help = true;