I just uninstalled the plugin, since it was not necessary for the functionality of the blog. It probably is an older version of PHP since this site has been on the same server for many years,

Sorry, the full warning reads:

Warning: Wrong value for parameter 4 in call to preg_match_all() in /home/a/axxxxxxx.org/html/serendipity/plugins/serendipity_event_imageselectorplus/serendipity_event_imageselectorplus.php on line 1008

Hello:

I loaded an image from my hard disk to the media manager base directory and then inserted it into a new
entry. The image displays ok, but the following warning message is displayed on the bottom of the page:

Warning: Wrong value for parameter 4 in call to preg_match_all()

Can anyone tell ...