Thanks for the wonderful plugin, saves lots of clicks.
If your wordpress is not installed in the root of your domain it won't work unless you change the file
wordpress-console/console.js as follows:
self.url = '/wp-content/plugins/wordpress-console/';
self.url = '/[your directory]/wp28/wp-content/plugins/wordpress-console/';
.. where [your directory] is the one your WP is installed in.
http://www.foo.bar/mywp/ is your WP root, then line 11 should read like this:
self.url = '/mywp/wp-content/plugins/wordpress-console/';