Won the game, reviewed stats and score, then the research complete (Arcane Forging) screen popped up.  At first I thought I'd unlocked some hidden tech (I've been playing Dynasty Warriors, so I'm in that mode ).  I clicked the continue research button (no other choice) and was taken to the technology screen.  I selected Arcane Weapons and hit research... and nothing happened.  Game completely hung.

Again, this was all after the victory movie, narrative, end game stats, and score.

Debug and auto save (from a few turns before victory)