Issue: Image Namespace image files in Asset Manager

If a user opens the attachment/asset manager while editing a forum article or possibly other articles in vB 4.1.8 and clicks on the file links on the left, images from the wiki Image Namespace populate the asset manager.

Depending on the user's permissions, they may get an error message when selecting the thumbnails from the display. If they have the privilege to load the thumbnails, they are inserted into the post with IMAGE tags rather than with ATTACH tags.

There does not seem to be any way to hide these assets from the attachment/asset manager.

The behavior is seen on our test board at http://mb.nawcc.org/newmb418/.