SharePoint 2007 balanced with cisco F5 (eng)

After that you have created a site collection and you have created an Announcements list, if this list is configured to use RSS feed on IE8, you could have this error message:

" RssWebPart: Exception handed to HandleRuntimeException.HandleException System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive.”

The reason seems to be connected with CISCO F5 Load Balancer that are blocking the correct functionality on RSS.