Thread:Project:Support desk/Easy way to upgrade from version 1.8 to 1.22? - Part 2/reply (15)

Then go to the history page of that page on the old wiki, click on any old revision (the link should be something like https://oldserver/w/index.php?title=pagename&oldid=123456 ) and adapt that URL to point to the new server/installation. If gives you an error about "this revision (123456) does not exist", then your export/import didn't succeed. If you see the page correctly, maybe there was some problem with the page title, maybe an encoding problem. Remove the  part of the URL to see the real title on your wiki and see what's different.