thats awesome! thanks i donno how i didnt notice that myself.
btw i really like this file manager extension. Do you know where i can get it separately, so i can use it on my own ckeditor in a different application?
@João - I have no other ideas for now. Do you have any special mod enabled for apache, like mod security?
If you take a look in backend -> misc -> app log, do you find something related to this?
Do you have access to your server logs to see if you can find something there?