I updated my device template, removing the HDMI input and adding an Optical input with the same IR code. Reloaded and retested, but same behavior:
08 04/01/09 18:21:58.837 Received Message from 10 (Media Plug-in / Living Room/Family Room) to 116 (AVR-886S / Living Room/Family Room), type 1 id 91 Command:Input Select, retry none, parameters: <0xb6e69b90>
08 04/01/09 18:21:58.837 Parameter 71(PK_Command_Input(Optical)): 932 <0xb6e69b90>
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08 04/01/09 18:21:58.837 Received Message from 10 (Media Plug-in / Living Room/Family Room) to 114 (PT-52LCX66 Discrete Inputs / Living Room/Family Room), type 1 id 91 Command:Input Select, retry none, parameters: <0xb6e69b90>
08 04/01/09 18:21:58.837 Parameter 71(PK_Command_Input(HDMI)): 361 <0xb6e69b90>
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08 04/01/09 18:21:58.837 Received Message from 10 (Media Plug-in / Living Room/Family Room) to 114 (PT-52LCX66 Discrete Inputs / Living Room/Family Room), type 1 id 91 Command:Input Select, retry none, parameters: <0xb6e69b90>
08 04/01/09 18:21:58.853 Parameter 71(PK_Command_Input(Component 1)): 712 <0xb6e69b90>
Good point, though. I was assuming that "HDMI" was just a label and didn't have any videoness attached to it, but this is something I should have tested out before I got to this point.
Any other ideas? Anybody know if this is just a bug?