We have to either a) be psychic and know it was updated, b) notice that it's in the Outdated category when it goes through the queue, or c) get a PM from the author asking for it to be moved to a different category.
![Wink](//cdn-wow.mmoui.com/images/style_mmoi_wowi2/smilies/wink.gif)
Occasionally, we'll glance at the category ourselves to see if anything old got an update to it.
edit: DamageMeters was moved.