We have migrated a very out-of-the-box SP2007 to SP2010 (DB attach) and have performed the visual upgrade for all sites.
Now when I open some wiki pages I get the notification: "The current page has been customized from its template. Revert to template". Reverting doesn't really work. Message still stays and site looks the same. The message seems to apear only on wiki pages which have been edited by the user in SP Designer an which have been disconnected from the original site template (they added web parts and stuff).
To get rid of the message I somewhere read that you could export the site, delete the wiki, create a new one and import it back.
I don't know if that really works and if this is the best solution but I thought to give it a try.
I tried to reimport the site but I get the message that the templates doesn't match, so the import fails. The old template seems to be WIKI#0 and the new ENTERWIKI#0. So I tried to create another site with not an "Enterprise Wiki template" but only a "Wiki Template" - but I cannot find it. No other wiki template is available in the template gallery.
I searched the web and I saw that WIKI#0 is still somehow listed as a template in 2010 but I don't know if that is only for some compatibility issues and the template itself is not selectable.
Maybe someone of you knows how to get the template or how to fix the initial problem (notification message and page not editable in browser because it is disconnected from the template)?