Couple of bugs I've noticed in the version I'm currently playing (06-27). Apologies if they were fixed in the most recent version.
Railroads aren't providing a production bonus to connected cities.
...
Railroads are providing the same movement bonus as un-upgraded roads (half movement). A 2 move unit on Railroads only moves 4 hexes.
I can confirm I am experiencing this as well (both the 1/2 movement rather than the 1/10? i think it should be, and the absent production bonus).
Here's pics showing the lack of production bonus from city connected to capital via railroad.
1. Surabaya is connected by rail to the Capital, Jakarta
http://i60.tinypic.com/2yobcjq.jpg
2. Showing lack of 25% production bonus in Surabaya
http://i61.tinypic.com/2ag0uqe.jpg
3. Showing that Jakarta is indeed the capital (it Has the Palace)
http://i57.tinypic.com/2gw6suu.jpg
4. Another view at the rail connection, and shows that the connection should provide a 25% production boost.
http://i59.tinypic.com/30axrep.jpg
**Attached the save file should it be needed.
Also, this isn't game-breaking, but there's something weird going on with trading. It might be related to the paper resource or maybe it's from the game itself.
The issue: Trade will work one way (ask what will make it work... for 2 horses), but will not the other way (ask what will you give me for 1 paper).
1. Open Trade Window
http://i62.tinypic.com/16ixrtf.jpg
2. Add 2 Horses to requested items window
http://i57.tinypic.com/o7rjn4.jpg
3. Click "What do you want for this?" (He has an offer)
http://i57.tinypic.com/29c2uys.jpg
4. Remove the 2 horses from trade window.
http://i62.tinypic.com/96cimg.jpg
5. Click "What will you give me for this?" (He can't see how to make it work, even though he had offered 2 horses for 1 paper just before)
http://i58.tinypic.com/jjlixu.jpg
**Attached the save file should it be needed.
EDIT3: Oh, and notice how he has 0 gold and is losing 122 per turn. Doesn't that seem a bit strange? Anyway, I'm fighting him now and he doesn't seem to have upgraded his units at all (galleass vs my ironclads, and crossbowmen vs my fusilier). Maybe he just had a rough start. I donno. But anyway, if his income is negative and he has 0 gold wouldn't his units be getting disbanded?
Also, a few turns afterward (during and end-turn), he proposes to trade his 2 horses for a luxury. When i tried to change this and replace it with paper, I noticed that paper was not showing up in my trade window. After exiting the trade I verified that I did indeed still have plenty of paper (16+). (EDIT 2: I suspect this is because he for some reason lost interest in my paper a few turns later)
Patch/mods used: same as before:
http://oi59.tinypic.com/op466p.jpg
EDIT1: Clearing the cache did not fix any of these issues.
EDIT4: forgot to attach this save file:
http://forums.civfanatics.com/attachment.php?attachmentid=395992&stc=1&d=1435831544