I'm using the Smarter Navigation plugin and it almost works exactly as I want it to. When I click through to a single post from a category index page, the next/previous links remain within that category, which is how it's supposed to work.
However, when I click through to a single post from my main index page, the next/previous links are limited to the category of the post I just clicked. My understanding is that this isn't how it's supposed to work! I want the next/previous links to include posts from all my categories when the post was accessed via the home page.
I'm using this code on my single.php page:
<div id="nav-below" class="navigation">
<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>
</div>
Any ideas?