hi
my configuration in 1.2.4-epa1 was:
set service dns dynamic interface pppoe0 service HeNet host-name 'XXXX'
set service dns dynamic interface pppoe0 service HeNet login 'XXXXXX'
set service dns dynamic interface pppoe0 service HeNet password 'XXXXX'
set service dns dynamic interface pppoe0 service HeNet protocol 'dyndns2'
set service dns dynamic interface pppoe0 service HeNet server 'ipv4.tunnelbroker.net'
It got complete lost during upgrade. Also I notice that the syntax has changed so that it is impossible to add more than one custom service at the same time.