I cannot navigate any of the subdirectories on *any* of the image/file/etc pop ups using Firefox 1.5.  Nothing happens when I click or double click on the directory.  I have no problem when going to the same page in IE.  I have tested this using the demo on the CuteSoft.net site as well as the editor I am using to enter this posting.  Nothing seems to work.

Here's a screen shot from the CuteSoft.Net site where I cannot navigate using Firefox 1.5.