The entire install is clean – all downloaded from the new version – due to a restructure and repositioning of the site I decided on a complete blank canvas and none of the files being uploaded are different from those in the downloaded 2.2 package.
I natuarally checked and indeed the version of the file matches that from the downloaded package, so it isn’t that, unless the version packaged is incorrect on the wordpress server (unlikely as I am the only person apparently suffering with this problem)
Any further ideas?