Cache control ignored?

[alphanull]

Hi,

have this mod up and running and it works great! But one issue remains: if I understand correctly, this mod also should respect cache control set via .htaccess. So I have the following:

<FilesMatch "\.(png|jpg|mp3)$">
    FileETag None
    Header unset ETag
    Header set Cache-Control "max-age=604800, public"
</FilesMatch>

But in my actual response I get this:

Etag    "dd9ae4-2695-515603e21cec0"

Etag should be disabled and no "Cache-Control" Header as expected. Maybe I am missing something, but what? Any help appreciated!