I was having a problem with the RSS feed for a bookmark in Safari. It was in a folder in my Bookmarks Bar. Whenever the feed was updated, the folder got a number, but the feed's bookmark in the pop down did not, making me wonder just which feed the update came from.
I fixed it by changing the RSS feed URL from:
feed://http://www.pimpmysafari.com/atom/ to
feed://www.pimpmysafari.com/atom/.
That is, I removed the http:// part from the URL. Now the number correctly appears next that feed just like all the other ones do.
[crarko adds: I haven't tested this one.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20100730004653816