Another issue I am having is with HTML Editor 3. When using it on a site that had the previous HTML Editor with Advanced File Manager enabled, I am not getting error. When trying to use the KFM Advanced File Manager, it appears to be looking for a table that does not exist.
The error I get is this:
alert("MDB2 Error: no such table\nSELECT extension, plugin FROM kfm_plugin_extensions WHERE user_id=1")