After carefully replacing my custom stuff (plugins and theme) I get the error:

[01-Dec-2011 04:03:24] PHP Fatal error: Cannot access protected property SearchEngine::$category_list in /Applications/MAMP/htdocs/tunafish/themes/tunafish/search.php on line 45

which points to if (is_array($_zp_current_search->category_list))

What's wrong here?

http://www.zenphoto.org/support/topic.php?id=10039#post-58956

thanks a ton.