I would love to use your plugin. It's exactly what I need, except I can't figure out how to use get_referrer_category(), which is essential for me.
right now, my code looks like this:
<div class="nav-previous"><?php previous_post_smart('« %link', '%title', true, true); ?></div>
<div class="nav-next"><?php next_post_smart('%link »', '%title', true, true); ?></div>
What would the code look like once get_referrer_category() is added? Where and how do I insert it exactly. I looked at various forums, and the readme file, and I still can't figure it out.