[TYPO3-english] preg_match Error in BE log

[Christoph Stadler]

Hello all,

i see a lot of these errors in the Backend Log but don't know what they 
mean or where this is coming from. I didn't find anything recent via 
Google about this

how do i troubleshoot this, is there any way to egt more info about 
where this is coming from ?

Core: Error handler (BE): PHP Warning: preg_match() expects parameter 2 
to be string, array given in 
/mydomainpath/typo3_src-4.5.2/t3lib/class.t3lib_arraybrowser.php line 204