Duplicate of bug #13291

see attached file, hope it's sufficient

I cannot locate the syntax error from that error message in the query 
you posted. Beside that, we would need the backtrace from the error too.

OK, here's the query:
HORDE: [turba] SQL QUERY FAILED: SQLSTATE[42601]: Syntax error: 7 
FEHLER:  Syntaxfehler bei »,«#012ZEILE 1: ...'', '', '', '', '', '', 
'', '', '', NULL, '', '', , '', '', ...#012                             
                                   ^  #012#011INSERT INTO 
turba_objects (object_type, object_firstname,#012#011   
object_lastname, object_middlenames, object_nameprefix,#012#011   
object_namesuffix, object_alias, object_bday, object_spouse,#012#011   
object_anniversary, object_yomifirstname, object_yomilastname,#012#011 
  object_photo, object_homestreet, object_homepob, 
object_homecity,#012#011  object_homeprovince, object_homepostalcode, 
object_homecountry,#012#011  object_workstreet, object_workpob, 
object_workcity,#012#011  object_workprovince, object_workpostalcode, 
object_workcountry,#012#011  object_otherstreet, object_otherpob, 
object_othercity,#012#011  object_otherprovince, 
object_otherpostalcode, object_othercountry,#012#011  object_tz, 
object_email, object_homephone, object_homephone2,#012#011   
object_workphone, object_workphone2, object_carphone,#012#011   
object_radiophone, object_companyphone, object_assistantphone,#012#011 
  object_homefax, object_cellphone, object_fax, object_pager,#012#011   
object_imaddress, object_imaddress2, object_imaddress3, 
object_title,#012#011  object_role, object_company, object_department, 
object_logo,#012#011  object_assistant, object_manager, 
object_category, object_notes,#012#011  object_url, 
object_freebusyurl, object_pgppublickey,#012#011   
object_smimepublickey, owner_id, object_uid, object_id) VALUES#012#011 
  ('Object', '', 'Last Name', '', '', '', '', NULL, '', NULL, '', 
'',#012#011  NULL, '', '', '', '', '', '', '', '', '', '', '', '', '', 
'', '', '',#012#011  '', '', '', '', '', '', '12345', '', '', '', '', 
'', '', '', '', '',#012#011  '', '', '', '', '', '', '', NULL, '', '', 
, '', '', '', '', '',#012#011  'rainer', 
'20140807153156.DiXBDP5o8ktBiKkSJ7_BIQ1@www.it-nerb.org',#012#011   
'LDNk3sr-HywmiF0vW212rQ8') [pid 1852 on line 204 of "/usr/sh

We would need a more detailed log file, showing the actual query being 
performed. Try setting the log level to debug and try again.

when trying to create a new contact, I receive an error-message that 
there was a server-error.

messages in log-file:
horde HORDE: [turba] PHP ERROR: PDO::quote() expects parameter 1 to be 
string, array given [pid 1332 on line 308 of 
"/usr/share/pear/Horde/Db/Adapter/Pdo/Base.php"]
horde HORDE: [turba] SQL QUERY FAILED: SQLSTATE[42601]: Syntax error: 
7 FEHLER:  Syntaxfehler bei »,«#012LINE 1: ...'', '', '', '', '', '', 
'', '', '', NULL, '', '', , '', '', ...#012