Finally got the firmware installed. I was concerned about the driver / extractable mismatches with my Windows XP x64 edition HTPC, so I tried it via USB from my 32-bit XP laptop. Ended up getting 5 "Device Restart" failures with this setup. I had unplugged the RS-232 cable to be safe here.
Finally, killed the USB connection and tried the upgrade using RS-232 from my x64 machine. Everything worked fine there ... software got upgraded successfully, which was nice.
I still can't switch to VIDEO5 via RS-232 -- is this a known bug, or do I have something wrong on my end? That was my whole reason for performing the upgrade ... every other input switch I've tried via RS-232 works perfectly every time.
I'm following the protocol doc posted in this forum. I posted a thread on this previously.
Thanks in advance for any insight you can provide.