No, it doesn’t need editing now. All you need is WP 2.5+, install plugin into /wp-existing-tags/
and have JavaScript enabled in your browser, since Dashboard already uses jQuery, and I have no need to load jquery.js once more for plugin.
If you’ll tell me your WP version and list of plugins you use, I will try to find confict.
Also, it can be browser conflict, but I have tested the plugin on IE6+, Firefox 2+, Safari 3+ and Opera 9+. What browser do you use?