[Koha] Borrower will leave soon?

Hello all, We've got Koha up and running after some minor struggling (although forgetting the root password was a major hurdle) We are running Koha 2.2.5 on Debian Sarge, and I transferred all patrons to mysql. Everything went swimmingly, and it all works great (including the Z3950 searches), however, even though almost all patrons are entered the same date (30/09/2006) and the expiry date is set one year later (30/09/2007) it keeps telling me that "borrower will leave soon". I know different people have different ideas of soon but this seems a bit much. Anybody any idea where to change this? Or what causes it? Thanks, Marty Jongepier