I figured out a solution. Its a total workaround but it works :)
So basically what I am doing is to save the content of every texteditorfield into an array and putting it back to the editor after the use of the sortable method.
so it looks like:
$("#content").sortable({
start: function(){
newEditors = new Array();
for(i=0; i < $("textarea").length; i++){
var content = tinyMCE.get(tinyMCE.editors[i].id).getContent();
var id = tinyMCE.editors[i].id;
newEditors[i] = {"id":id, "content":content};
}
tinyMCE.remove(); //as a fix for FF
},
stop: function(){
ini(); //re-initiate the tinymce again (if you don't do that, the field wont be editable)
for(var nr in newEditors){
tinyMCE.get(newEditors[nr].id).setContent(newEditors[nr].content);
}
}
});
So if sb has the same problem and figures out an other way to solve it, would be nice to see those solutions too.
Thx Cervisias