Hoops, and anyone else having HDMI problems, here is what I have found on a recent installation of a VSX-94. The customer already had in place a PS3, Samsung BD/HD player, Samsung DirecTV receiver, and a Samsung DLP bought elsewhere. I don't know the models of the Samsung gear. For background info, the TV and sat receiver were on the entire time I was setting up the receiver and speaker system.
Everything connected HDMI through the 94 to the TV. Upon turning on the 94, PS3, and BD/HD player, the only signal I could get to display on the TV was from the sat receiver. Like Hoops, the 94 OSD did not display on the TV (I got the Samsung variation of Not Supported on its screen). The 94 flashed Not Supported on its front panel for the PS3 and BD/HD player.
Leaving everything powered up, I disconnected the PS3 and BD/HD player from the 94 and connected them to the TV. I changed the settings in the PS3 and BD/HD player to output 1080i instead of 1080p. I also turned off all Samsung HDMI controls in the TV and BD/HD player. By navigating the 94 on the front panel display, I disabled its HDMI control as well.
Reconnected everything through the 94 again, and achieved picture passthrough from all sources. The OSD from the 94 was also now passed to the TV. I then assigned the HDMI inputs 1-3 to TV/SAT, DVD, and BD so the customers had easy access to their devices on the 94's remote.
I then went back into the settings of the PS3 and BD/HD player and reset them to 1080p output. Everything worked great through the 94, and the 94 still passed its OSD to the TV.
While showing the customers how to run the system, many devices were turned on and off in random sequence, and inputs were changed back and forth, without any drops in signal either through the 94 or between the 94 and the TV. I have yet to have a call from the customers with any HDMI issues since leaving their house that day almost three weeks ago (knock on wood).
I'm not sure if this is a permanent solution to those who have had issues with HDMI and Pioneer Elite receivers, but it was the solution in this situation.
I hope this information can help with anyone running into these kinds of headaches.