TYPO3 Core

I get the following errors in my DB check cronjob:
"PHP Warning: array_unique(): The argument should be an array in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 151
PHP Warning: Invalid argument supplied for foreach() in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 167
PHP Warning: array_unique(): The argument should be an array in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 151
PHP Warning: Invalid argument supplied for foreach() in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 167 ***********************************
Reference Index TESTED (nothing written)

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Warning: array_unique(): The argument should be an array in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 151

Warning: Invalid argument supplied for foreach() in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 167

Warning: array_unique(): The argument should be an array in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 151

Warning: Invalid argument supplied for foreach() in /home/ess-erfurt/www/htdocs/t3lib/class.t3lib_flexformtools.php on line 167
4652 records from 51 tables were checked/updated.

Index Integrity was perfect!"

PHP Version 4.3.10
mysql Client API version 4.1.16
TYPO3 4.0
(issue imported from #M3892)