I know there are a number of issues already raised (and some resolved) to do with RSS feeds, but I've searched for others with the same problem as me with no luck.
I originally realised there was a problem with my RSS feed after FeedBurner failed to update following a recent post.
If I view the raw feed (http://wv4.co.uk/feed/) in Firefox I can see the most recent post on their - everything looks fine.
However, the raw feed in Internet Explorer has not updated - the same happens if I run it through FeedValidator.org, and FeedBurner.
The original problem occured with WP 2.0, I've just upgraded to 2.0.3 with no difference. I've also tried deactivating the various plugins I use, but nothing has solved it.
It seems strange that one browser sees the updated feed, but another browser doesn't, when they're looking at the same page. Anyone got any clues?