Magento TinyMce editor bug. Missing folders

The tinymce wysiwyg editor used in the admin area appears to have a bug:

So I create a folder and upload a file to it (which appears to work just fine) then close the file upload dialogue. When I reopen the file upload box my folder and its 开发者_开发问答contents have disappeared. If I check via FTP the folder is there. So I'm guessing it's perhaps a permissions issue? But I've chmod'd everything in the media wysiwyg folder to 777 and it still doesn't work.

Any ideas? Anyone seen this before?

Thanks

Ok so it was all to do with a missing base table (core_directory_storage).

Changing to database and then synchronizing the media storage in System > Configuration > Advanced > System > Storage Configuration for Media worked. (Then changing back to File System).

This reply helped me: http://www.magentocommerce.com/boards/viewthread/219878/P15/#t326388

Thanks