The Buffalo guide is broadcast from WNED (PBS 17). I don't know if your Kuro is capable of accepting a digital TVGOS signal (17-1 AKA 43-1), because in April WNED's analog signal is going away for good.

I also have a Pioneer Kuro, but it's not connected to OTA, just cable, where it gets the guide from CTV who for some reason recently stopped showing US off-air channels. If that change isn't accidental, then it seems a lot like dirty pool.