[support] Why doesn't Drupal sees the "files" folder?

[dondi_2006]

> > * creating that directory, with the same owner and group as settings.php
> 
> This is probably your problem. For a directory to be considered a 
> directory, it MUST have execute permissions. Common configurations are 
> 775 or -drwxrwxr--, depending on how your control panel visualizes it.

the directory has permissions 755, owned by the www server user; isn't it enough?
Also: must it be in the drupal installation root or in (for virtual hosting)
drupalroot/sites/virtualdomain_1/files ??

D.