We know that MSN generates an RSS for your search query…now apparently it can search within your feed content, as opposed to searching the html content…ie. searching in the feed version of your content is searching just within the body of your page, eg. just the blog posts, and not any of the sidebar stuff.
But the issue is what if you don’t have full-text feeds, then it is only searching excerpts of your post (this is not a complete picture)
…see more on this.
Here’s an analysis by people that you can always understand, they always seem to make things clear.