Users are very confused and worried any time a new version of wiki software
is launched and tested, and some major or minor bug comes invariably out.
A clear message using central sitenotice, with links to doc pages listing
the changes at different levels of detail and to their talk pages to
discuss them and to alert for bugs, is mandatory IMHO. Tech news are
largely insufficient; evidence of work in progress should be clearly
visible into all pages of interested projects. It's a basic matter of
Wikilove.
Alex