Uh, guys, it's me again. It happened yet again, in the exact same spot. Only this time, I was using Yarn's build exclusively through the entire campaign. The exact mission is right at the end, the the second of the two part series where you can't pick your ship. That's the same spot it was at the last time, and it's doing it again. Just like last time, making a new save works. But I only used fs2_open_3_6_19_SSE2_Yarn.exe. I haven't even touched the launcher in weeks. Oye. I was really hoping to finish this time...
As for how the error was created, I don't really know. I did the first mission, and then upon entering the second mission, I realized I was woefully equipped for it and bailed. I saved there and came back to it a couple days later, and boom, can't play it. Crap. At least, pretty sure that's where it was saved, to be honest it's been a couple of days and I didn't pay that much attention. It could be the first of the two. Anyway, I sent the error log last time, so is there anything else I can do?