After a couple of hours played I usually have 3-4 provinces with half movement rate and "build no tower" bug. The only way to avoid that would be to turn off disasters completely (at least storm and earthquake, plague is fine). Anyone knows how to do this? Turning off the event disatsters does not affect the random ones and the red dots in disasters.tga donīt seem to be the trigger either (many disasters in non red dotted regions).
edit: sorry xd