Hi,
I had an issue with dialog module of kamailio v3.3.3. Is the same described on
http://lists.sip-router.org/pipermail/sr-users/2012-November/075735.html . I think the issue is related to dgl_hash.c on line:192 *dlg_ka_list_head = NULL; should be *dlg_ka_list_tail = NULL; and line:216 *dlg_ka_list_tail = dka; should be *dlg_ka_list_head = dka;. I will test it as soon as I can, but meanwhile I'm attaching the patch that should fix it so you can test it and report back the results if you want to.