Within this, the final instructions in the paragraph titled 4.iv. Automatic update package reads:
I used that link yesterday and got into a mess because the software was attempting an install.Point your browser to the install directory, for example http://www.example.com/phpBB3/install/
Shouldn't the link for an update be to http://www.example.com/phpBB3/install/app.php/update
Sorry if I posted this in the wrong place, but it's not a bug and I'm not sure it's a support request.