I have a problem with db impot in koha(3.6). Troble in uncorrect filling 100$a author subfield. A biblio.author of 3.6 works differently(when I manually create a book) as in 3.4, it's create some kind datecode and then recording author(20121007 frey50 | Akunin B). But when I have making import system create only datecode ( for ex. 20121007 frey50) and no info about the author. In earlier version (3.4) import was and everything worked grate.
Sorry, there is not enough information on this bug report, versions listed are no longer maintained.