Probably the first of many XML errors, but I thought I should flag this now to make sure this is an error and not something else. One of the new things that can be constructed early is the "Promethion Pleasure Park" which is supposed to "greatly increase the morale of a colony" but instead improves its income, as seen in the following screenshot:

I am playing a custom faction that was created in 5.1, but that probably isn't making any difference. If this is indeed a bug, I'll send in a ticket when I have the chance.