I'm using the feedreader Bloglines and see very often new posts although just a typo has been corrected in an existing post. Well, in bloglines you can deactivate the option "Updated Items" in each feed. But if someone is adding something important to her/his post (and not just correcting typos) I want to be informed.
This is what I experienced when using feeds.
But now I would like to improve it on my blog :-):
Whenever I just correct typos, URLs or change a category I do not want that this is being displayed as "updated post" in feedreaders. But if I add some additional info (e.g. an info provided in the comments), the post should appear as "updated" after it has been saved.