We are currently running Mediawiki 1.13.3 on a Linux machine and we are trying to upgrade to Mediawiki 1.17.0. Everything went well until we got to the stage of updating the database. We ran the command % php update.php And got the following results: MediaWiki 1.17.0 Updater Going to run database updates for mediawiki Depending on the size of your database this may take a while! Abort with control-c in the next five seconds (skip this countdown with --quick) ... 0 ...ipblocks table does not exist, skipping new field patch ...ipblocks table does not exist, skipping new field patch Creating interwiki table...ok Adding default interwiki definitions...done. Fatal error: Call to a member function isMultipleKey() on a non-object in /usr/local/mediawiki-1.17.0/includes/installer/MysqlUpdater.php on line 249 Any suggestions on how to proceed will be appreciated. Thanks Malki Cymbalista Webmaster, Weizmann Institute of Science malki.cymbalista(a)weizmann.ac.il Tel: 08-9343036