I had the same problem with the Drengin and the Fertility Clinic.
Nargaff
In the XML file the Drengin Slave Recycler and its upgrade are marked as IsPlayerWonder. I guess this is a mistake.
Thanks for the answers.
The description of Environmental Manufacturing says it gives +1 Level but to what? I didn't see a change in production in my colonies. It would be nice if someone could explain this.
The Xeno Medical Center shows on all my planets a construction time of 2^32=4,294,967,295, but it gets built a lot faster.
In the Iridium Tech tree there is a technology Industrial Specialization. It gives Manufacturing Cost -5% twice. Does this mean -10% or should it be only -5% once?
It is possible to build a uniqe building like the Iridium Store or a Power plant more than once on one planet. As soon as the building gets upgraded the lower level version can be built again. So it is possible to have several different power plants sitting next to each other. Is this how it is supposed to be? In GalCiv II you could build only one power plant per planent and if it got upgraded you still could not build another one.
I build the Missionary Center from the Empathy ideology trait but it didn't give me on belevolence point per turn as described.