Hi, It seems I ran into the same issue on 5.0.1. Was using pua.publish and my Kamailio complained "Entity: line 1: parser error : Start tag expected, '<' not found Messages-Waiting: yes ^ 2(8) ERROR: presence [presentity.c:283]: check_if_dialog(): failed to parse xml document" The content-type is "application/simple-message-summary". Do we need the same patch in 5.0.x? Thanks, Bing