If someone updates a post a few days or even a few hours after you read it and adds a PS or whatever additionnal information, you usually never notice it… and this is why I love Syndirella: it will notice that for you and display the updated post (and feed title) in blue until you read the changes! Did I say that before? : Syndirella rocks!! :D
Btw, version 0.9b [dead link] is out.