strage beahviour of apache.. auto mod_rewrite?

[Lordek]

Hi, I have ispcp 1.0 installed in a up-to-day debian Lenny.
First apologize by my bad spelling

When I access to one folder through http if there is any *.php script there apache shows the php file instead of the folder content.
Example:

-domain.com
|-httdocs
-|- httdocs/file.php
-|- httdocs/file/
--|-httdocs/file/example.php

when i browse http://www.domain.com/file/example.php it redirect to the file.php script. If there is no *.php with the same name of the path it browse correctly. It happens no matter how many subfolders I browse (with domain.com/file/hello/this/is/one/example/)

There is not .htaccess with modrewrite rule and it occurs with ALL the domains.