Edit: (original text below)
The most current version of GalCiv2 is 1.8g, which is available for download on Stardock Central. It fixes pathfinding bugs that were introduced in 1.8e, and in many cases will fix people's problems with error 12 when attempting to submit a metaverse game. As long as your serial numbers have not changed in the registry since you started the saved game, you should be able to submit it. However, the problem still remains if you have had to re-install GalCiv2 and have updated serial numbers from the lookup serial function in Stardock Central, so it's always a good idea to try and finish a metaverse game before re-installing Windows or anything else that would cause you to need to update your serial information. If that's not possible, you can get the original serial number that was saved into your save game from the xml file in My Documents\My Games\GC2DarkAvatar\Metaverse that is created when you attempt to submit the game. You should have this file and the end game save zipped and attached to any e-mails you send into support regarding metaverse error 12.
If Stardock Central is showing that you have the latest version installed but your Dark Avatar titlescreen still says 1.8e, you will need to either re-install Dark Avatar to get the latest version or edit the key in the registry.
Here are instructions on how to edit the version string in the registry:
First, close Stardock Central. Go to Start->Run and type in regedit. On Vista, type it in the search box. As soon as the registry opens, click on the My Computer icon and choose File->Export to backup the registry.
The install info for GalCiv2 is under HKEY_LOCAL_MACHINE, in the path Software\Stardock\Drengin.net\GalCiv2\DarkAvatar.
Just change the version string to 1.7 and SDC will show an update to 1.80g.
Here are instructions to make sure that you get the latest version once you've either re-installed or changed the version string in the registry:
Befiore installing the update, go to Tools->Settings and click on Internet. US-1 is usually the best choice for servers because sometimes we have sync errors with US-2. Click Refresh XML Data. Also, if you have the setting turned off to check for updates to Stardock Central, turn it back on and then re-start Stardock Central. If Stardock Central finds an update, let it update then restart SDC when prompted.
If the above method doesn't work for you, it may be a more general issue with Stardock Central and I'll need you to send in these files to email@example.com:
(Original text follows:)
I'm sorry about the bug with the pathfinding. I didn't realize the code that was causing it made it into the 1.8e build, as I wasn't expecting to make that build and I had already started backporting some code from TA intended to fix the error where ships in gigantic galaxies will (1) seemingly randomly lose their destination, (2) not go to rallypoints and (3) fail to move towards a destination, but I hadn't had a chance to test it at that point.
As for the error 12 when submitting scores to the metaverse, I found a bug in the code that gets the serial number from the registry that may have been there for quite awhile. So people who weren't getting the error 12 may start getting it now with this build because now the game will be submitting the correct serial number, so they may have to change the serial that their character is using.
We're not going to have time to properly test a Dark Avatar build this week, so I'm going to put up a link to a build for you to test here, and you can test it if you want to. However, I recommend backing up your save games and your current build before trying it, since there is the risk that this will change the serial number that is being submitted to the metaverse.
To use this build, you should already have DA 1.8e installed. If you have the latest version of Dark Avatar installed from SDC, go to the folder where GalCiv2 is installed and open the DarkAvatar subfolder. Copy the GC2DarkAvatar.exe and Lib3D.dll files into another folder to back them up. Then extract this zip to that folder:
(edit: I have removed the link because the SDC build is now the latest one)
Please make bug reports regarding this build in this thread or e-mail firstname.lastname@example.org so that it will be easier for me to find them. If you e-mail email@example.com, please make sure to say in the body of the e-mail that it's the 1.8f test build, and include your debug.err file. If you have a save game to reproduce a problem, please zip the save game and attach it as well.