Problems with Plugins and RSS when 1 JSPWiki runs under 2 different domains

we are running one instance of JSPWiki under 2 Tomcat vhosts.
For internal use: jspwiki.rechenkombinat.intern
for external use: jspwiki.rechenkombinat.de

because we can't reach the external domain through our router.

Everything seemed to work fine, except that we couldn't specify jspwiki.baseURL because it does not only enable RSS-Feeds but also interferes with other processes like saving an edited page: Wwhere you would normally be redirected to the view of the edited page the redirect used the baseURL as a prefix if specified. Is that necessary if it works as well without a baseURL?

The other problem occurs with plugins like the IndexPlugin, RecentChangesPlungin and ReferringPagePlugin.

These work only consistently within one domain, external or internal. So one could only see changes made internally or externally depending on access.

Is there a way to circumvent these problems by ignoring the prefix of URLs so that the Wiki can be used under 2 different domains?