Thread:Extension talk:WYSIWYG/Using RichTextEditor cannot put an internal link on wiki page

MediaWiki      1.17.2 PHP    5.2.14 (apache2handler) MySQL  5.5.15-enterprise-commercial-advanced-log WYSIWYG extension (Version 1.6.0_0 [B8], CKEditor 3.6 (revision 6902))

Only way to add an internal link on a page is to switch to WikiTextEditor. Is this by design? Or is something missing?