Here is a list of known bugs in version 0.1.0: - After a long time (5 minutes ) rtp streams need to be re-synchronised. This is cause by sound cards clocks that don't have exactly the same rate on both computer. - It is not recommended to change properties while a call is happening. This may cause rtp session to fail in creating. (I don't know why.) This should be fixed in a future version. Simon MORLAT