Is this front or backend? Are you getting any errors?

Frontend only, backend works fine. 

No errors. :) 

what I had in mind are javascript errors.

Is this wat you mean? :) 

Some extension or template javascript is causing this error - as error message is about jce, this is the first extension to look at. You will need to find out by trial and error which one is responsible, beside jce start with temporary using one of default joomla temlates and see if it works then. Javascript execution breaks on error and since buttons don't work as they depend on working javascript.

Hi Klas

You're right, I changed my template and everything works now. Thanks! :) 

Hi,

I have the same problem with my own template (done with Artisteer) and with the default "Beez 3" template. 

Only the default "protostar" tempale is working:

And something strange: 4 days ago all templates were working. I have done no modification and now the buttons of the Field X disappear...

If someone have a solution !?

Sly

Include icomoon fonts in the index.php file of your template.

$doc = JFactory::getDocument();

$doc->addStyleSheet($this->baseurl.'/media/jui/css/icomoon.css');

Working :-))

Thanks a lot,

Sly