It failed to post several times before... If a sysop can delete the original "testing 1,2,3" post, I'd have no objections.
Here's my list - everything I remember, anyway:
1. I talk to myself a lot. Instead of saying "Yeah, Alan Bradley, that's right," I say "Yeah, [my own name], I'd rather talk to myself in the third person and pretend it's you."
2. Orbital terraformer doesn't work. In fact, it locks you out of the tiles that would have been upgradable. It's a severe downgrade.
3. Privateer doesn't protect freighters. The freighters and the routes blow up, just the same.
4. Galactic Travel Guide doesn't reduce the cost of the survey modules to zero. I notice no change at all.
5. Custom race bonuses - loyalty and soldiering - remain even after the defaults are cleared. You can manually clear them, but it's too big of a temptation for me not to exploit it!
6. I haven't tested the hypotheses, but it seems that galactic wonders and super projects that should effect the empire only affect the planets they're built on. Restaurant at the end of the Universe and Omega research center seem to only really work if they're built on influence planets or research planets, respectively.
7. Custom race +3 trade routes didn't seem to make any difference when I played it. I get twelve after all the research with or without the bonus.
That's all I can remember right now. This game rocks, but these bugs are pretty annoying.