Ahhh, disappears with

$conf['sql']['phptype'] = 'mysql';

in /horde/config/conf.php

Thanks a lot

Duplicate of bug #9090 and others.

Hi, here I have Debian Squeeze, MySQL 5.5.8, PHP 5.3.5. Horde 
Groupware Webmail 1.2.9 was installed on this fresh system (no 
upgrade). I can log in to Horde/IMP and send mail, but when trying to 
create an address book an "MDB2 Error" occurs.
There are no errors in webserver log (nginx), horde.log gives

Jan 25 08:22:26 HORDE [error] [turba] MDB2 Error: unknown error: 
_execute: [Error message: Unable to execute statement]
[Last executed query: INSERT INTO turba_shares (share_name, 
share_owner, attribute_name, attribute_params, perm_creator, 
perm_default, perm_guest, share_flags, share_id) VALUES (?, ?, ?, ?, 
?, ?, ?, ?, ?)]
[Native code: 0]
  [pid 3882 on line 452 of "/var/www/horde/turba/lib/Turba.php"]

This error occurs for all modules (mnemo, turba, kronolith, nag). 
MySQL-Log gives


  24 Connect   horde@localhost on horde
                    22 Init DB   horde
                    22 Query     INSERT INTO turba_shares_seq (id) 
VALUES (NULL)
                    22 Init DB   horde
                    22 Query     SELECT LAST_INSERT_ID()
                    22 Init DB   horde
                    22 Query     DELETE FROM turba_shares_seq WHERE id < 26
                    22 Prepare   INSERT INTO turba_shares (share_name, 
share_owner, attribute_name, attribute_params, perm_creator, 
perm_default, perm_guest, share_flags, share_id) VALUES (?, ?, ?, ?, 
?, ?, ?,
  ?, ?)
                    22 Init DB   horde


...so, there is no error. Like I said, DB was fresh installed. The 
*_seq-Tables contain all one row with an id. horde_prefs and 
horde_sessionhandler is filled up with some entries, but all other 
tables are empty? DB was set up with groupware.mysql.sql script from 
scripts-directory.