I have the same issue. What happens is that the LIRC device does not appear to pick up on the fact that a command has been sent to its child device (the TV).
So pressing "Resend AV Commands" then pressing HDMI for my TV does nothing, and the following is logged by the DCERouter:
Received Message from 10 (Media Plug-in / Living Room) to 90 (Hitachi LCD / Living Room), type 1 id 91 Command:Input Select, retry none, parameters: <0x677f7b90>
But pressing advanced next to the command, and the pressing "HDMI" in the list of available commands for the TV works, and the following is logged:
Received Message from 126 (Orbiter / Living Room) to 63 (LIRC Embedded Transmit / Living Room), type 1 id 191 Command:Send Code, retry none, parameters: <0x677f7b90>
i.e. when the command is sent direct to the LIRC transmitter it works, but if it is sent to the child device the LIRC device (parent) does not react.
Can any of the devs confirm/deny this? Seems a bit odd that there would be a bug in this without loads of people complaining!