I get a 500-internal server error, because of the .htaccess, which get’s rewritten to:
# 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
# BEGIN RETINA_IMAGE_SUPPORT
<IfModule mod_rewrite.c>
Options -MultiViews
RewriteEngine On
RewriteCond %{HTTP_COOKIE} HTTP_IS_RETINA [NC]
RewriteCond %{REQUEST_FILENAME} !@2x
RewriteRule ^(.*)\.(gif|jpg|png)$ $1@2x.$2
# if @2x isn't available fulfill the original request
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)@2x\.(gif|jpg|png)$ $1.$2
</IfModule>
# END RETINA_IMAGE_SUPPORT