My fix ;)
/includes/functions_wysiwyg.php clon and rename functions_wysiwyg_dbtech_classifieds.php
functions_wysiwyg_dbtech_classifieds.php
change line 97
// $vb5_config =& vB::getConfig();
// $vbulletin->input->clean_gpc('r', 'showhtml', vB_Cleaner::TYPE_BOOL);
saved ...
I changed your...