hey just installed this tonight
I am getting 404 errors whenever I click the Press This link on any page outside of my own domain.
I can press the link while viewing the wp backend or i can go to a visitor page on my site and click the link and it will activate the editor.
If I go to any other site I get a 404
The site I am trying it on is a subdomain.mysite.com
It is not a WordPress Network site it is a manual setup with its own install of wordpress 3.0.4
here is the link url it seems correct as to the domain and directory.