The application on the client's server has the same problem.
If editor wants to edit the property that has inline editor (such as rich text editor), the property field never shows up in edit mode and in the area for that property there is a text "Loading Editor".
JS error is 'PreloadIcons is undefined'.
Have you got any conclusion or suggestion to avoid this error?
When im in editmode and the editor is loading i get the jacascript error 'PreloadIcons is undefined' and the editor is then useless. If I disable all properties for the editor in admin mode it works cause then its just a textarea. I got CMS 5 R2.