Image file picker in WYSIWYG editor inserts broken external links to files in Alfresco repository

Trying to insert an image link from a configured Alfresco repo via the WYSIWYG editor while selecting the "Link external" checkbox results in broken image URLs.
In other words, direct linking to image resources in Alfresco does not work right now.

Turns out that only the node ID is inserted, rather than the full image URL.
Alfresco's developer wiki lists the proper format(s), here is the one needed for anonymous ("guest") access to a file.
http://wiki.alfresco.com/wiki/URL_Addressability#Guest_Access

See attached screen shots for the steps taken.

Thanks,

• Stefan