Nothing in Apache or Syslog files.
I found this in my brand new website logs...
[Fri Jun 05 19:00:16 2009] [error] [client 184.108.40.206] File does not exist: /var/www/clients/client1/web1/web/index.php
[Fri Jun 05 19:35:37 2009] [error] [client 220.127.116.11] (13)Permission denied: file permissions deny server access: /var/www/clients/client1/web1/web/administrator/components/com_extplorer/images/eXtplorer.gif, referer: http://samimattila.com/administrator/index.php
To fix the perms I did the usual chmod's on files/folders and tmp folder.
It seems that everytime something 'new' is installed (like eXtplorer) new files are installed with insufficient permission and I have to manually fix the perms afterwards.
I'm not sure how to check the 'user_beancounters' in Proxmox/OpenVZ