Folks, I too have been struggling with RSS. I have uploaded 1.5.2 but something still doesn't seem right. I have loaded a bunch of different RSS formats from my site into my bloglines account, but new messages aren't showing up on bloglines, nor in Feedburner. These two services download the existing posts when the account is created, but it's as if WordPress never updates the new posts (or that these services can't recognize them). Both services are working with my blogger accounts, so I'm pretty sure the problem isn't with Feedburner or bloglines.
Does this have to do with the way WordPress is trying to deal with RSS? Is there no plugin to create traditional XML files that can be read by these services. Help!