CSS fixes in IE7 haven't been much really, they've only fixed the most requested bugs, but haven't bothered to fix all the other little bugs that are just as bad (and missing features). Now there are
new CSS bugs in IE7 that we have to watch out for. I'd rather keep working with IE6 for another year to allow enough time for IE7 to get with the standards support of today.
IE7 is a fix for IE6, and IE8 will be a fix for IE7.
You just described Firefox, Opera, Safari, and every other major broswer too.
IMHO it should be like the IE back and forward buttons. A simple button you can just click that goes to the first feed, but with a down arrow segment for a drop down list that lets you choose a specific feed.
Or an option that can change the behaviour from either a simple button or a dropdown box.