[Freeswitch-users] RTP Wrong Timestamps and audio hiccups in conferencing output

Hi, I am seeing periodic RTP Wrong Timestamps and audio hiccups when using conferencing. I am calling in from two phones on the local LAN, and playing a 440-Hz tone into the conference  on one of the phones. On the receiving phone, I hear an audio hiccup (and the server-side Wireshark trace shows a  Wrong Timestamp) about once every 750 ms.  It is very regular on the output from the conference.   The server-side Wireshark of the input RTP stream looks fine -- there are no anomalies. I am seeing this problem on version 1.2.10 and 1.5.5b. Is this something I need to report as a bug? Thanks, David