That sounds almost exactly like the problem I just had. Hopefully this is a solution for you. I found that I needed to add an extra section to the relevant Apache config (i.e. add an extra section to that given as the Debian example config).
In addition to the <Directory> section for /usr/share/wordpress given in the example config, you also need a <Directory> section for /etc/wordpress . I used the same options, but they probably need to be tweaked a bit. Hope that helps…
