@ isnorden: Horem has already mentioned the Iron thing (weird that I don't have that problem), so I'll speak to the religion bit. Way back when Decimatus was running Procylon's Call To Power, he made plans to implement a religion system, complete with Social Policies. He placed the Religious Techs that we still use now, and I am inclined to believe that he was going to add more, but he never got around to it. I will see where I can add more benefits for religions other that Judea-Christian so that the bias is eliminated.
@ thadian: Whew what a post

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1)I believe that there are too many techs to all fit on one Tech Tree. I promise that beelining gets better once you get use to it

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2)I've noticed the icons falling as well. I think it is tied to the bad prereq lines, which I am constantly on the lookout for.
3)For the oak and citrus, I take it you mean while in strategic view? As far as I know, there is no way to change the icons as they appear in SV. There have been some developments, but I don't think anyone has successfully added a new unit/resource that shows properly in SV. When they do, I will implement it immediately, as I don't like looking at duplicates either (the worse for me are all of the bonuses that use the iron icon).
4)Glad you like the monopoly system; the idea for that was developed in this thread (I think it was Horem's idea actually). Like Horem said, the building require at least one local source, but takes the resource requirement from the empire's total. The first monopoly buildings in the Ancient and Classical era do not require any quantity of resource to build, so you can spam those as much as you want (though I don't recommend this). Starting in the Medieval era, these buildings start requiring resources to build; the trade off is that they are much stronger.
If we do use a planting system, I think (just my opinion here) that it would be best for the later eras (Modern on back). There would have to be some limit on it though, or else every tile would have a resource on it.
5)The suggestion for the extra spy isn't bad at all. The way I have designed it, a player should spend 50 turns in Ancient, 75 in Classical, and then 100 turns for every era after. By that logic, spies don't come into play until turn 225. Yeah, I think I'll do that

. Thanks. I'll withhold judgement on the extra wonder for now.
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Yeah, the Liberalism v Conservatism thing is completely coincidental; not that there's anything wrong with being extremely conservative *cough*. These effects were done by me about a year ago; there were so many policies that came before them that I had run out of ideas. Don't worry, I don't try to put any of my personal political/religious beliefs in the game.
**EDIT**
And thanks 3335d and thadian for the text issues. Just fixed them