I perform the following scenario (openser v1.2.1): 1) Send a SUBCRIBE to openser for the presence event with expires = 3600 2) The subscription is established. Openser sends a NOTIFY with PIDF body. The sequence number in the CSeq header is 516. 3) 1 hour later I send an in-dialog SUBSCRIBE to extend the subscription for another hour. 4) openser sends a NOTIFY having sequence number 516 in the CSeq header. The sequence number of the NOTIFY should have been higher (517) as the sequence numbers of in-dialog messages should increase. I think this is a bug. Regards, Michel -- Michel de Boer www.twinklephone.com