Refused are on Saturday
Looks like Refused updated their tour dates and they've listed Saturday as their spot at F3F this year. Since that jives perfectly with what I've found out about the other Black stage headliners, I'm gonna go ahead and assume that the info is correct. So, then, we're looking at this for Black Stage:
X -- Friday
Refused -- Saturday
Turbonegro -- Sunday
Maybe they're thinking that Saturday will be the biggest night of the fest, thereby putting Refused on that night? Still no new info on the days for the Blue stage headliners and I've only been able to place PiL on the Orange stage on Friday. Lots more info to dig up!