As every website should use a secure connection from the webserver to your browser, this very site is now also available via https. i finally managed to set everything up to use a certificate accepted by all browsers withouth any warnings. :)
[update] downloading an album works again :)
all who wanted to download a whole album should be quite satisfied now due to the fact that a nice little link is shown on every album page which allows to download the album as a zip file.
and zenphoto is also updated to the latest version, btw! :)