Correct, that's what I read: only a fix for note stuck ON when DW-8000 used as a master keyboard.
This said, I've heard a stuck note when using it as a slave keyboard through MIDI too. On the other hand, it is not too bothersome and doesn't happen often enough to feel I need to use a newer firmware.
Thanks for sharing, John. It could go in the Files section here as well.
Yash