We only play the game on one machine each.
This happened several times in a row so I decided to do a reinstall, and the bug seems to be gone - for the moment at least
Could the file 'PBEMRegistry.dat' have anything to do with save files being corrupted? Any ideas what this file is actually for? I notice that it's not been modified at all since installing the game so apparently nothing gets written into it by the save process.
Stian