I have a bug where if I want edit difficulty in Custom difficulty, it has no Monarch, Government, Other and AI-Cheating. If I play Custom difficulty that only has Immigration and Natives, the game itself is start to freeze and even I can't close it like normally.
Here's the image**
I can not reproduce this with either current trunk, latest nightly build or stable release. If the game is hanging, that usually means it has crashed. To understand a crash we need the log file (FreeCol.log). A crash this early is most likely due to an installation error, so you might consider removing FreeCol from your machine and reinstalling it.
I have also seen this occur - it was after a few other games and I was messing with the custom settings. I think there was a save error with the custom file and the game crashed. The error occurred as described above when I checked custom, but the game would crash on progression from that screen. I ended up uninstalling and reinstalling to fix.
Any log files capturing this would be greatly appreciated.
This area has had another round of rewrite since this report, and there have been no further sightings. Closing.