t_msgbuilder.c build_uac_req() has:
if(headers == NULL || headers->len < 15 || _strnstr(headers->s, "Max-Forwards:", headers->len) == NULL) { maxfwd_len = MAXFWD_HEADER_LEN; } else { maxfwd_len = 0; }
It should add Max-Forwards if it missing, but for some reason it does not happen with ACK.
-- Juha