The reasoning in this CFJ’s incorrect, but I’m not sure I dislike the change anyway. (Posts don’t need to be in a specific category to follow a specific format.)

ais523, I would argue that a format defined by a rule is necessarily a category in the ordinary language sense, as “which rule defines this as an Official Post” is the most obvious way to categorize Official Posts, but as you say it doesn’t matter.  (Not to be confused with blog categories.)

I don’t see the problem with the current wording. Is it so important that a story post be in the category “Story Post”?
The way I see it Story Posts are all posts that have an effect on play without being proposals/cfj/dov/whatever.
For instance, last dynasty’s Blockades http://blognomic.com/2011/12/ were Story Posts.

I don’t see the point of the current definition, though - it’s not used by anything, and I can’t think of a reason it ever would be, since it’s not a useful criterion of posts to address as a group.  (Feel free to prove me wrong.)  If I remember correctly, Story Posts used to be posts recommended by the rules to include flavor, which makes more sense, considering the name; this CfJ doesn’t do that (and the time bomb is not recommended to include flavor - the only reason I mentioned “Story Post” in that rule is that the wording is based on the last time bomb), but it’s more in line with such a requirement if it’s added in the future.

I would also vote for removing the definition entirely, though.