Encoding Issue after Migration

Hi,

I used this guide: http://requesttracker.wikia.com/wiki/MigrateMysql2PostgresqlV4 to migrate from Centos/Mysql (MariaDB) to Ubuntu/PostgreSQL. But now all non-ascii-characters are “garbled”. For example:
Prüfen -> Prüfen
Würden -> würden

Are there ways to correct this in the source or destination server?

Thanks,
Vinzenz