Thread:Project:Support desk/MediaWiki 1.5 to 1.21 upgrade

I have a MediaWiki 1.5 server that is broken, a lot of the features dont work - i think something got broken when it was migrated from a windows machine to a linux machine.

I need to move the whole thing from the current machine to a new one - whats the best way? I have built a new mediawiki install using 1.21 and then copied the DB over but the update.php fails.

any suggestions?