News: Patch v1.09 is out. Click here for more info.
Major Bugs
Minor Bugs
Graphics Bugs
Bug or Feature?
Official Patches
How to Upload Files
1. Diplomacy
2. Memory Leak
3. Random Map Generation
4. Tutorial
5. Hotseat Trading
6. Initial Build Suggestion
7. Open Borders
8. Trading at a Discount
9. Free Gold
10. Iron Works
11. Space Ship Completition
12. Captured Palaces
1. Wonder Movies
2. ToolTip
3. Mouse Rollovers
4. Combat Results
6. Scouts and Woodsman II Promotion
7. Titled-Axis Map
8. Space Elevator
9. Science Advisor
10. Naval Movement into Enemy Territory
1. Yield Display
2. Dark Terrain
3. "Cheshire Cat Grin"
4. Terrain Splotches
5. Edge of Minimap
6. Great Wonders
7. Stealth Bombers Intercepting
8. Research Bar with Great People
9. Resource Display in Hotseat
There are also miscellaneous graphics bugs like a two headed horse and a floating house.
Civ4 Bug Reports Center
Major Bugs
Minor Bugs
Graphics Bugs
Bug or Feature?
Official Patches
How to Upload Files
Major Bugs
1. Diplomacy
Bug: In diplomacy, you can get whatever you want.
Steps to Reproduce:
1. Open diplomacy.
2. Demand whatever you want (cities, techs, etc.).
3. When the AI proposes a counter offer, it is the same as you demanded.
4. Accept the offer to gain what you wanted.
Additional Info:
You can also trade resources to the AI even if they don't have the technological requirement to use it yet, and vice versa.
2. Memory Leak
Bug: When Alt + Tabbing, it will take a while to get back into the game even with sufficient amounts of RAM (even with 2GB, people still experience this problem).
Steps to Reproduce:
1. Start a game.
2. Alt + Tab to another program.
3. Try to alt tab back in, and it will take minutes to fully come back (10 minutes, 20 minutes, and 60 minutes have all been reported).
3. Random Map Generation
Bug: The random map generator is not random; some maps generated by multiple people are the same.
Steps to Reproduce:
1. Load Civ4.
2. Start a Custom Game with the default settings.
3. You will get the same map as some of the following pictures attached.
Additional Info:
This bug has not been able to be reproduced for some people.
4. Tutorial
Bug: There are several bugs including: if you save the game and reload later, you'll get a Conquest victory. If you have to work a tile that a forest has grown on and don't have Bronze Working, you can't continue. A typo includes spelling "then" instead of "than" for the line "Archer units are stronger then Warrior units."
5. Hotseat Trading
Spoiler 5. Hotseat Trading (fixed) :
Bug: If you are alone on an island/continent, it will suggest to build a scout. If there are other AIs, it will suggest a warrior. You can easily tell if you are alone or not early on in the game without exploration.
Steps to Reproduce:
1. Load Civ4.
2. Found your first city.
7. Open Borders
Spoiler 7. Open Borders (fixed) :
Bug: When an Open Borders agreement is cancelled, the AI's units do not get removed out of the territory, sometimes resulting in war if that is the AI's intentions.
Steps to Reproduce:
1. Load Civ4.
2. Sign an Open Borders agreement with an AI, and wait for AI units to enter your territory.
Additional Info:
Fixed with v1.09
Bug: When trading with a civ, you can get anything for 10 gold / 1 gold per turn.
Steps to Reproduce:
1. Start diplomacy with a civ.
2. Ask for a resource/technology.
3. Give all your gold as your offer.
4. Choose "What would make this deal work?"
5. If they accept, right click on your offer and change it to 1 gold per turn.
6. Click accept.
Additional Info:
9. Free Gold
Spoiler 9. Free Gold (fixed) :
Bug: When trading with a civ, you can get anything for 10 gold / 1 gold per turn.
Steps to Reproduce:
1. Start diplomacy with a civ.
2. Ask for 1 gpt.
3. Make your offer 1 gpt.
4. Choose "What would make this deal work?"
5. When they affirm the deal would work, right click on the AI's gpt and change it to whatever you want.
6. Click accept.
Additional Info:
Fixed with v1.09
10. Iron Works
Spoiler 10. Iron Works (fixed) :
Bug: The Iron Works is bugged and doesn't provide the +100% bonus to production.
Steps to Reproduce:
1. Found a city and hook up coal and iron to your trade network.
2. Build Iron Works.
Additional Info:
Fixed with v1.09
Bug: If you start building SS components, cancel one, and try to build it at a later time, you will not be able to choose it, therefore not being able to win via Space Ship.
Steps to Reproduce:
1. Have a city start an SS component.
2. Cancel the project and switch to another build.
3. Try to switch back to SS component.
Additional Info:
12. Captured Palaces
Bug: You can have multiple palaces, as captured palaces don't get destroyed when you take them.
Steps to Reproduce:
1. Start a game and found your city with a palace.
2. Capture an enemy capital and get a second palace.
3. As a result, maintenance is lower than it should be, and you get free culture.
Additional Info:
Minor Bugs
1. Wonder Movies
Bug: The wonder movies' music and audio stutters and skips.
Steps to Reproduce:
1. Start a game.
2. Build a wonder.
Additional Info:
2. ToolTip
Bug: The ToolTip feature says the Police State Civic has no war weariness when it really only decreases it by 50%.
Steps to Reproduce:
1. Start a game.
2. Look at ToolTip for Police State Civic and switch to it.
3. Mouse Rollovers
Bug: The pop-up related to mouse rollovers sometimes does not appear.
New Additional Info:
This bug occurs when "Right Click Menu" is selected on the options screen.
4. Combat Results
Bug: You can tell the results of combat before it is over.
Steps to Reproduce:
1. When you first engage the other unit, your experience bar will immediately go up (if you are destined to win).
2. The health bar gives away the winner; the dying unit will have an empty health bar, so you can tell who will die. The only exception is if a unit retreats..
6. Scouts and Woodsman II Promotion
Bug: Scouts do not get the movement bonus from the Woodsman II promotion in forests and jungles, unlike units such as warriors.
Steps to Reproduce:
7. Titled-Axis Map
Bug: People have reported Crashes to Desktop (CTDs) for numerous points in the game only when playing the Title-Axis Map. They include using Great People, Worker Actions, and Using Missionaries to Spread a Religion.
Steps to Reproduce:
8. Space Elevator
Bug: The Space Elevator is only buildable at places within 30 degrees of the equator, yet this isn't mentioned anywhere in the game unless you read the XML.
9. Science Advisor
Bug: Many times the F6 Science Advisor won't let you go to another advisor when you press another F# key.
10. Naval Movement into Enemy Territory
Bug: If you have a ship with units in it, and you move it into the borders of a civilization with whom you don't have an Open Borders agreement, it asks you declare X number of times, where X = # of units + 1 (ship). This makes it annoying if you have a large stack; rather, it should only ask you once for the whole group.
Graphics Bugs
1. Yield Display
Spoiler Yield Display (fixed) :
Bug: Only food appears for the yield display, instead of food, hammers, and gold.
Steps to Reproduce:
1. Start a game.
2. Turn on yield display.
Additional Info:
This bug seems to mostly be a problem with nVIDIA cards, though it has been reported with others.
Fixed with v1.09
Bug: The terrain appears dark until you zoom out, when you then cannot see the units.
Steps to Reproduce:
1. Start a game.
Additional Info:
People have reported this bug even with graphics cards that have T&L.
3. "Cheshire Cat Grin"
Bug: Leaderheads are only partially visible (eyes, lips).
Additional Info:
4. Terrain Splotches
Bug: Floodplain splotches appear in the FOW.
Steps to Reproduce:
1. Start a game and look for floodplains.
Additional Info:
People who have reported this have also reported the Yield Display bug.
5. Edge of Minimap
Bug: The map seam has caused various problems for some people.
Additional Info:
People who have reported this have also reported the Yield Display bug.
People have also reported workers walking on water, possibly due to the map seam.
6. Great Wonders
Bug: If you build many wonders in one city, then they will not all display on the city's tile: some of the old wonders will be displayed on the tile to the northwest.
7. Stealth Bombers Intercepting
Bug: This bug allows Stealth Bombers to appear to intercept planes, while they don't actually do so.
Steps to Reproduce:
1. Find a city with stealth bombers and jet fighters.
2. Alt+Click the city and only planes should appear.
3. Hit the eye button so the intercept button comes up.
4. Hit the intercept button and your Stealth Bombers will appear to intercept.
Additional Info:
This bug also occurs with units like tanks and artillery. If you select the tanks and hit bombard, all units will appear to bombard, while only the artillery does so. It is providing animations for units that shouldn't be able to do that.
8. Research Bar with Great People
Bug: When using a Great Person to partially discover a tech, the research bar won't be updated unless you do something to trigger it to update like go into a city, go to a window, or if you don't do the aforementioned, the next turn.
9. Resource Display in Hotseat
Bug: In hotseat multiplayer, with the resource display on, the resources don't go away until after the next player enters their password. That means that while the other player types their password, they see all of the previous player's resources in the middle of the black background.
There are also miscellaneous graphics bugs like a two headed horse and a floating house.