I'm using Bloglines, Yahoo and Google -- and the update are not showing on any of them. It DOES seem to be a problem with the aggregators and not with WP. They ALL apparently stick with the first XML they get and not go after a new one(?)
I found that I can foce these aggregators to go get a new XML by changing the format on the blog for Permalinks (changed it from Date and Name to Default). Bingo, with the new URI for the feed, the aggregator goes out and gets it right. At first I though it must work better with "Default" (cat=4) style, but NO. ONce the aggrergator has fetched that feed once, It seems to retire. I can find no way to force it to update -- browser cache cleared, nada.
So now I'm back to the prettier permalinks, and i get this discrepancy -- using the category Jazbox feed as my example:
The URI is http://mediaspanusers.org/wp/category/Jazbox/feed/
In Bloglines, when I use the URI I get an ancient result -- one of the two posts hasn't existed four five hours!
But in my browser if I type that same URI I get, of coure, the raw XML, AND IT IS CORRECT -- has the two correct posts, and not the ancient one that Bloglines insists on still displaying.
S I'm sure that WP is outputting it correctly, and that ALL THREE of the aggregators I've tried all cache and do not update for hours/days/months?
I've testeed this teory on THIS BLOG (WP SUPPORT) and it is just as bad here! my earlier ABCD response to you, your response to me are both missing from the feed on all three aggregators. EVEN WHEN I switch browsers from Firefox to IE (ergo no browser cache; and cookies in a different location)!!