

Cset 5 appears to be black. This is in Palette 00.
Additionally, I checked out the Color cycling area, just to be sure, and in the third Cset slots, the "Last" dialog (Central input box.) had a 6 in it for no apparent reason. I doubt it's related to the bug though, as I reset it to 0, and it changed nothing. Cset 5 is simply black.
I suspect it to be a Main Palette thing. o.o'