Undefined Offset Error adodb.inc.php

[keir]

I'm getting errors in the log that I'd like to get rid of. i am running OJS 2.3.7.0
One common error turning up is


] [error] [client 180.76.5.138] NOTICE: Undefined offset: 1 (/var/www/journals/lib/pkp/lib/adodb/drivers/adodb-postgres7.inc.php:116)
[Thu Sep 13 11:33:06 2012] [error] [client removed] NOTICE: Undefined offset: 1 (/var/www/journals/lib/pkp/lib/adodb/drivers/adodb-postgres7.inc.php:116)
[Thu Sep 13 11:33:06 2012] [error] [client removed] NOTICE: Undefined offset: 1 (/var/www/journals/lib/pkp/lib/adodb/drivers/adodb-postgres7.inc.php:116)

The stack trace that immediately follows this is;

ojs2 has produced an error\n Message: WARNING: Cannot modify header information - headers already sent by (output started at /var/www/journals/lib/pkp/lib/adodb/adodb.inc.php:377)\n In file: /var/www/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php\n At line: 296\n Stacktrace: \n File: (unknown) line (unknown)\n Function: PKPApplication->errorHandler(2, "Cannot modify header information - headers already sent by (output started at /var/www/journals/lib/pkp/lib/adodb/adodb.inc.php:377)", "/var/www/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php", 296, Array(7))\n File: /var/www/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php line 296\n Function: header("Content-Type: text/html; charset=utf-8")\n File: /var/www/journals/pages/article/ArticleHandler.inc.php line 229\n Function: PKPTemplateManager->display("article/article.tpl")\n File: (unknown) line (unknown)\n Function: ArticleHandler->view(Array(1), Object(Request))\n File: /var/www/journals/lib/pkp/classes/core/PKPRouter.inc.php line 370\n Function: call_user_func(Array(2), Array(1), Object(Request))\n File: /var/www/journals/lib/pkp/classes/core/PKPPageRouter.inc.php line 266\n Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)\n File: /var/www/journals/lib/pkp/classes/core/Dispatcher.inc.php line 129\n Function: PKPPageRouter->route(Object(Request))\n File: /var/www/journals/lib/pkp/classes/core/PKPApplication.inc.php line 180\n Function: Dispatcher->dispatch(Object(Request))\n File: /var/www/journals/index.php line 65\n Function: PKPApplication->execute()\n Server info:\n OS: Linux\n PHP Version: 5.1.6\n Apache

In previous PKS posts this error is blamed on (int) casting however inspection of the possible php code segments, they seem to have the correct cast.
Any suggestions as what to check would be appreciated.