also note that in the root of http://www.lithouse.eu, I have a .htaccess that says:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
This comes with the WordPress default install.
Same problem here. Uploading files does not work on a Mac (tried Safari and Chrome) and gives an Error 500. No solutions available, and as I understand from the above discussion, the developer is basically saying “figure it out yourself… good luck”.