I have completely rebuilt my site and installed 5.3.3 from scratch. I have 5 errors encountered during the database upgrade to 5.3.3. They are all of the same format so I have only reproduced the logfile entries for the first error below. I am using OpenSuse LEAP 42.1, Apache2, Postgresql, PHP5.5.14. Any ideas please?

2016-06-11 21:48:38.158 ** ERROR ** Exception-[22P02] SQLSTATE[22P02]: Invalid text representation: 7 ERROR: invalid input syntax for type numeric: ""
LINE 1: select * from parameter where idUser ='' and idProject is n...
^
2016-06-11 21:48:38.158 ** ERROR ** For query : select * from parameter where idUser ='' and idProject is null and parameterCode='editor'
2016-06-11 21:48:38.158 ** ERROR ** Strack trace :
2016-06-11 21:48:38.158 ** ERROR ** #0 Sql->query called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:1740]
2016-06-11 21:48:38.158 ** ERROR ** #1 SqlElement->getSqlElementsFromCriteria called at [/data/nfs/www/projeqtor/model/Parameter.php:687]
2016-06-11 21:48:38.158 ** ERROR ** #2 Parameter->getUserParameter called at [/data/nfs/www/projeqtor/tool/projeqtor.php:2726]
2016-06-11 21:48:38.158 ** ERROR ** #3 getEditorType called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:799]
2016-06-11 21:48:38.158 ** ERROR ** #4 SqlElement->insertSqlElement called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:627]
2016-06-11 21:48:38.158 ** ERROR ** #5 SqlElement->saveSqlElement called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:475]
2016-06-11 21:48:38.158 ** ERROR ** #6 SqlElement->save called at [/data/nfs/www/projeqtor/model/History.php:101]
2016-06-11 21:48:38.158 ** ERROR ** #7 History->store called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:1001]
2016-06-11 21:48:38.159 ** ERROR ** #8 SqlElement->updateSqlElement called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:621]
2016-06-11 21:48:38.159 ** ERROR ** #9 SqlElement->saveSqlElement called at [/data/nfs/www/projeqtor/model/persistence/SqlElement.php:475]
2016-06-11 21:48:38.159 ** ERROR ** #10 SqlElement->save called at [/data/nfs/www/projeqtor/model/UserMain.php:836]
2016-06-11 21:48:38.159 ** ERROR ** #11 UserMain->save called at [/data/nfs/www/projeqtor/db/maintenance.php:339]
2016-06-11 21:48:38.159 ** ERROR ** #12 include called at [/data/nfs/www/projeqtor/tool/loginCheck.php:52]
2016-06-11 21:48:38.166 ** ERROR ** Exception-[22P02] SQLSTATE[22P02]: Invalid text representation: 7 ERROR: invalid input syntax for type numeric: ""