I upgraded my wiki from version 1.2.x to 1.6.7 this week without any problems, here's what i did: * make a backup :-) * use Special:Export on the old wiki to create xml files including all the revisions * you can get a list through Special:Allpages and Special:Users (that's the complete wiki for me) * I installed a fresh wiki on a seperate server * Imported the xml files through Special:Import as Sysop on the new wiki * copied all stuff under 'upload' to 'images' * exported and imported the sql of the old user table to keep everybody happy * ran the maintenance scripts to rebuild the images and index for search) * Revert the main page to the correct version (this is they only filled page from the new wiki) * Copied the new wiki folder to the old server * create a database in mysql on the new server and export and import the full database (all tables)
all works again, including the revisions done to all pages.
hope that helps. Collin