Afforess
The White Wizard
Must be an isolated issue I'd say, I've played at least a dozen games on 2.71 and mostly made it to late Renaissance era (had to restart many times because of new updates of mini-mods) and I've occasionally had it CTD but not as frequently as 2.8 does.
Good news bad News. My latest beta's have no waiting for civ bug anymore. However, I have discovered a cause for some CTD's. Apparently, somewhere in the formula for the AI deciding the tech to pick, it divides by 0. That causes a CTD. I'm working on it though.