It looks like the 3.06 problem, all players and the host must use the same version or the game is crashed (according to some comments in the patch thread).
Ulm was going to win IMO.
ps : Weren't backups supposed to be kept since the stales problem ?
pps : I had a good fire gems production with lots of fetishes + an alchemist I may have continued many turns even with low income (and more if I could take Arco cities), and was preparing an ethearal army (and gathering magus to BE my mages) to counter the earthquakes squad, I was also going to have evocation 9 for the next battles. You would probably have won our war economically after 10-15 more turns anyway, but not without new huge losses.