I'm not sure if these are bugs or not but for the Vasari, even with 8 labs and pre-requisites (for the tech lines) researched I still couldn't research summoning the dark fleet, or the giant cannon. I could click them and queue them and the research tab would show they were in the queue, but they would never start, even if I cleared out all the other queued stuff. Then when I would queue something else up behind it, it would start instead.

The other thing is that the Vasari structure-protection power, I forget what it's called, but makes them intangible. The auto-cast for deactivation is broken, so watch your structures. Half of my trade posts/media centers shut down and I couldn't figure out what was wrong until I realized they were all refusing to come out of protected mode.