The photos of that Baltimore screening shows that the print had a slight color shift but nothing major that would make white subtitles to appear yellow. What I read from his statement is that they were clearly yellow nothing in between, it would be nice to hear from timdiggerm about this again, who knows maybe the guy he knew who posted those earlier photos have a picture of them. It's been a while since that screening in Baltimore now, strange things can happen with the memory as we all know. I think they were white but I'd love to be proven wrong, but until then my best sources for the subs are the bootleg and Puggo Grande.