I'm having a problem where I'm unable to go into nested (child) folders in the document browser; when I click on one, it appears to load but no files show in the listing and there are files there because I put some into the folder via regular FTP as a test.  Even more odd is that I can upload files to a nested folder; I get a confirmation that the upload succeeds, I verify it's on the server, but then I cannot see the file to add it as a link in the HTML editor.

 

Anyone have any ideas as to what might cause this problem?