I have noticed because I was using Housecode M, that the Transmitter / Controller modules are not recognizing any address starting with M. It just says unknown.
Unknown:9:Off
Unknown:10:Off
SDM seems to receive commands correctly:
PLC:eventraw=08
PLC:receiveX10raw=00 07
PLC:receiveX10=M9
PLC:eventraw=08
PLC:receiveX10raw=01 03
PLC:receiveX10=M Off
PLC:eventraw=08
PLC:receiveX10raw=00 0F
PLC:receiveX10=M10
I tried & changed my housecode to N, and all is ok, I tried the other letters as well, seemed to work correctly, just M broken.