If you recently had Plesk upgrade and you notice that the address book in horde is no longer showing, chances are the PSA-Turba file is missing or was never updated. You can take your chances with the plesk updater or you can attempt the following;

1) First of all, make sure that 'psa-turba' RPM is installed:

rpm -q psa-turba
If it is not, you can install it with autoupdater or manually from the opt/horde/ directory in Plesk distributive tree.

/root/psa/PSA_8.0.1/dist-rpm-FedoraCore-2-i386/opt/horde
 If the file is not there, you can get it from http://autoinstall.plesk.com/PSA_8.0.1/dist-rpm-FedoraCore-2-i386/opt/horde/psa-turba-2.1.1-fc2.build80060613.20.noarch.rpm
Type wget http://autoinstall.plesk.com/PSA_8.0.1/dist-rpm-FedoraCore-2-i386/opt/horde/psa-turba-2.1.1-fc2.build80060613.20.noarch.rpm to grab it
rpm -ivh  psa-turba-2.1.1-fc2.build80060613.20.noarch.rpm to install it.
 2) Records in 'My AddressBook' are not shown.

# cat /usr/share/psa-horde/turba/scripts/upgrades/1.2_to_2.0.mysql.sql | mysql -uadmin -p`cat /etc/psa/.psa.shadow` horde

3) Records in 'Private' or additional AddressBooks are not shown.

To fix it, please, download the attached sources.php.gz file, gunzip it and replace the file

/etc/psa-horde/turba/sources.php

with the new copy.

attached files: sources.php.gz
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