Default source button hide text

Hi,

I'm facing an issue with the last version of CKEditor 4.3.3. When I click on the default "source button" (not in inline mode), the whole text "desappear" and the editor become uneditable.

There are several CKEditor instancied after a click on a button.

I tried with a simple page with none of my js scripts and all works great :/

The CKEditor js file are added at the bottom of the page.

I show you my config file :

CKEDITOR.editorConfig = function( config ) {
	// Define changes to default configuration here. For example:
	// config.language = 'fr';
	// config.uiColor = '#AADC6E';
    config.language = 'en';
	config.toolbar = 'MyToolbar';
	config.toolbar_MyToolbar =
	[
        { name: 'Document', items :[ 'Source'] },
	    { name: 'clipboard', items : [ 'Undo','Redo' ] },
	    { name: 'editing', items : [ 'SelectAll' ] },
        { name: 'basicstyles', items : [ 'Bold','Italic','Strike','-','RemoveFormat' ] },
	    { name: 'paragraph', items : [ 'NumberedList','BulletedList','-','Outdent','Indent' ] },
	    { name: 'links', items : [ 'Link','Unlink','Anchor' ] },
	    { name: 'tools', items : [ 'About' ] }
	];
};

I don't know which other information I can give you.

Hope you will find an answer ;)

Thank you