URL integrity check - Link to page on Jahia homepage causes warning

If I create a link to a page on the Jahia homepage: e.g. href="http://www.jahia.net/jahia/Jahia/pid/589#6" I get a warning that page [589] is not reachable and that the link may cause a 404 error.

• Field contains a link to the page [589], which is not reachable. That will cause a "404 Error", if the link is followed.

Does that mean, that I cannot create warning-free links to websites created with Jahia, when they have jahia/Jahia in the URL?

Do we make checking of valid existing URLs also vor external URLs or just for internal ones ?