I wasn't able to find anything about this anywhere, my apologies if this has already been addressed: I just upgraded from 1.5.5 to 1.10.1, the update.php ended with an error, but the site seems to be upgraded and operating normally. Current Versions: - MediaWiki <http://www.mediawiki.org/>: 1.10.1 - PHP <http://www.php.net/>: 5.2.1 (cgi) - MySQL <http://www.mysql.com/>: 4.0.27-standard-log I followed the upgrade process as follows: -'upgraded' to php5 by using a .htaccess file (shared hosting running php4 and 5) -wiki is not live so didn't lock the database -backup and copy files -ran 'php5 maintenance\update.php' Here is a snippet of the last few lines written to the console: Creating templatelinks table... Populating... Done. Please run maintenance/refreshLinks.php for a more thorough templatelinks update. No img_type field in image table; Good. Already have unique user_name index. ...user_groups table already exists. ...user_groups is in current format. Making wl_notificationtimestamp nullable... ok Adding timestamp key on logging table... ok Setting page_random to a random value on rows where it equals 0...changed 0 rows Checking for additional recent changes indices... ...index on ( rc_namespace, rc_user_text ) not found; creating ...index on ( rc_user_text, rc_timestamp ) not found; creating Creating redirect table...ok Checking for backlinking indices... Checking if pagelinks index pl_namespace includes field pl_from... ...index pl_namespace on table pagelinks has no field pl_from; adding Creating page_restrictions table...ok Migrating old restrictions to new table...ok Deleting old default messages (this may take a long time!)...Done Checking site_stats row...A database query syntax error has occurred. The last attempted database query was: " SELECT * FROM `etsite_stats` WHERE ss_row_id = '1' LIMIT 1 " from within function "do_stats_init". MySQL returned error "2006: MySQL server has gone away (dbxxx.xxxxx.xxx)" After this, I tested out the site, and it seems to be upgraded correctly. New features are functioning correctly and nothing is obviously broken. Did the upgrade fail, or is this not a critical error message? Thanks in advance, Justin