Comment: Weird characters show when running setup.php

This symptom may be related to compression. By default YACS tries to gzip delivered content. On some sites this feature may be disabled if compression is provided by another sub-system (Apache, etc.). This is usually done after setup completion.

You may ask YACS to not compress data by dropping the following lines into shared/parameters.include, which is a simple text file:

<?php
global $context;
$context['without_compression']='Y';
?>

Then relaunch setup.php again. Don't use this trick at setup time. See new comment below.