If I use an online redirect checker like redirect-checker or seobook.com I do get a "SERVER RESPONSE: HTTP/1.1 302 Moved Temporarily" for all pages, even for the homepage.
I tried to fix it by modifying .htaccess:
#RewriteRule .* index.php [L]
RewriteRule .* index.php [R=301,L]
But this results in a "broken" redirect like:
http://www.example.com/www/sites/www.example.com/files/html/index.php
Further I changed
System -> Configuration -> Web -> Url Options
and set "Auto-redirect to Base URL" to 301 (before 302). Cleared ALL caches in backend and var/cache - The online checker still show the same - 302.
Any ideas how to fix the issue? Thanks!