I'm creating my sub-theme based on Zen's starterkit. I copied node.tpl.php from zen to my theme and started making some customizations. Then I realized that I really only wanted those customizations to happen to the Article content type, so I renamed my subtheme's node.tpl.php to node-article.tpl.php but when I do it doesn't get used when I'm viewing my front page which has a list of articles. If I rename it back to node.tpl.php then it immediately gets used again. Back to node-article.tpl.php and I get nothing.
What am I doing wrong?