Hide .svn directories with Proftpd

According to the HideFiles documentation, HideFiles only gives files "hidden-ness", it doesn't actually hide them. To hide them, you need to use IgnoreHidden within a Limit block. So, try this:

<Directory /home/ftp_user/my_project>

    HideFiles ^\.svn$

    <Limit ALL>
        AllowUser ftp_user
        IgnoreHidden on
    </Limit>
</Directory>