Problem with encrypting /var/www and ikiwiki

I tried to encrypt /var/www with encfs. To do so I did following: mv /var/www /var/www.bak mkdir /var/www_enc encfs --public /var/www_enc /var/www cp -a /var/www.bak/* /var/www/ /etc/init.d/apache2 restart I tried it with my local ikiwiki (localhost/myikiwiki). Browsing worked perfectly but when I tried to save an edit I got the following error message: Failed to save your changes. Your changes were not able to be saved to disk. The system gave the error: Your changes are preserved below, and you can try again to save them. However if I revert the changes, everything works perfectly. I don't understand this, since the encrypted /var/www folder should look to the outside world exactly as the old unencrypted version would (especially because I used the --public switch). Any idea what may be wrong and how to fix it? System Info: - Ubuntu 11.04 - Apache2: 2.2.17-1ubuntu1.2 - ikiwiki version 3.20110124ubuntu1