Am Dienstag, 23. Dezember 2014, 10:53:36 schrieb dep:
> after the upgrade to R14, my kmail address book seems to have disappeared.
> 
> (frankly, i've been a little cross ever since the simple 
> one-line-per-address, plain text address book was deprecated ages ago in 
> an attempt to be More Like Windows, but never mind.)
> 
> when i sought to use it after the upgrade, it was entirely empty.

addressbook should be
$HOME/.trinity/share/apps/kabc/std.vcf
maybe your old addressbook is in another location.
you should be able to find it via

find $HOME -name std.vcf

HTH

Werner