Hi Tanu, thank you for reviewing my patches. I understood the (forward?) compatibility problem of the new encoding type. I will revise the patch and re-send it once the compatibility is solved / confirmed. I thought at the beginning it would be alright because if (a) v3server -> v4client: enc.type >= PA_ENCODING_MAX at v3 should not be passed from server, (b) v4server -> v3client: client should filter-out enc.type >= PA_ENCODING_MAX at v3, (c) v3server <- v4client: server should ignore the received enc.type >= PA_ENCODING_MAX at v3, (d) v4server <- v3client: client should not send enc.type >= PA_ENCODING_MAX at v3, but those must be confirmed and there must be lots of other things to check as you said, including ext_device_restore/save. ----------- Akihiro