If I include an rss that is not hosted on http port 80, the port is removed from the links, so they don't work properly.
Example:
{{rss>http://internalserver:8000/trac/report/1?format=rss}}
Then the links are to
http://internalserver/trac.... but I've checked that they are ok in the generated RSS.
Links in the description are not modified and work properly.