- Use UTF-8 for Thunderbird address book backups if there is a character which cannot be encoded in a default charset
- Add preference to specify charset for Thunderbird address book backups: gmcont.dump_charset
- Add de-DE and ru-RU locales
If you are in the same trouble, install v0.4.10 and set gmcont.dump_charset to the proper charset by the Config Editor. In order to check the proper charset, export an address book to a csv file by Thunderbird's export function and see the encoding of the file by a text editor which can see a file encoding.