Ah, at last. The forum told me to login, but I was logged in. But every time I loaded this page the page thought I was not logged in...
Anyway. The problem is isolated to the sql-queries. So if its eZ Publish that fails or its the sql-database, I really don`t know. But I guess its the database. I tried to run SELECT * FROM .. where I putted the word='La'. This result in two rows. In with La and one with Lå.