Aurora is on version 1.9.5 C#, available at the Aurora Forums.
Contact Erik on the forum for a wiki account.
The maximum service sector size has been reduced from 75% to 70%. The effect of this is an increase in the manufacturing population by 5% of total population. For a population on a colony cost zero world with max service sector (a home world for example), the manufacturing sector will be 25% of population, rather than 20%.
This change is because of the increased worker requirements for shipyards, plus the increased need for financial centres and maintenance facilities. I considered lowering the starting numbers of factories, but decided to maintain the existing balance and free up more population instead. Otherwise, the standard start will generally have a manufacturing efficiency problem.