1.4.0 doesn't seem to work...

We just tried going to 1.4.0 and got this result - make sense to
anyone?! TIA


> OK - I've upgraded the Wiki software to version 1.4.0.  It all seemed
> to go smoothly, so please check if everything looks OK.  In case of
> emergencies, I backed up the old version into folder mediawiki-1.3.1,
> and also dumped the old database into that folder (using mysqldump) as
> file database-dump.
> 
> Oh no!  I just logged in to the Wiki and all the dates are completely
> crazy, although the data all seems to be there.  Should I revert to
the
> old system?
> 
> 
 and
> 
> 
> The new installation was unusable.  Apart from the silly dates, I
> couldn't update any Wiki pages.  The "recent changes" pages showed a
> list of changes dated in the year 2030, and the history of an
> individual page showed potty dates such as 1919 or 1995.  Check it out
> at http://www.ucl.ac.uk/calt/alpd/wiki-new
> 
> I've now reverted to the old system.  I restored the old database into
> a new one with a different name (uczaw3e_alpdwiki2).  The restore from
> the dumped database appeared to go OK - please check that everything
> seems in place.
> 
> I'll try to think of another way to do the upgrade.  I was trying to
do
> it in the existing folder, in case you had made any changes to it. 
> Have you ever added or changed any files in the folder?  If not, I'll
> try it in a new folder.  Doh - just tried it in a new folder and got
> the same mess.  I'm a bit stumped.