Hi all, My server is running the latest git stable build of Freeswitch, all config is default and server/clients are on simple LAN setup. I'm having an issue when using ZRTP on one client only, specifically the dialling client. The calling device has ZRTP enabled, and the called device does not. In this scenario, the FS server should act as a man in the middle and exchange keys with the calling device. This results in the A leg being encrypted and the B leg un-encrypted. However as soon as the key exchange initiates, the A client errors and tears down the call. What's strange is that when I initiate the call from the non-zrtp client to the zrtp client, the keys exchange fine between server and client A, and 2-way audio is present. So it's only when it's the dialling handset do I have the problem. I've then gone on and tested the same thing on the latest git, and the problem goes away. So my question is, can anyone advise on what changes/patches have been applied to the latest git that has resolved this issue? I've tried to search the git tree, but I'll be honest I'm a bit unfamiliar with how it works and I'm not sure that I'm searching properly. The ZRTP device is an iPhone running Groundwire, and it doesn't seem to matter what codec I use. Thanks for the help!