Teaser break not working with CKEditor 3.4

Similar issue was described in http://drupal.org/node/814970 but those solutions didn't fix the problem for me.
The problem was that Insert Teaser Break button generates JS error: "getAttribute is not a function". After some debugging I found out that when creating a teaser break (which in fact is a html comment) this plugin uses a function called createFakeElement that is not supposed to operate on html comments because it tries to access getAttribute('align') method which on comments doesn't make sense. The solution was to add this method to comment object before it is passed to createFakeElementFunction. The second place where the problem occures is when switching from source to Rich text editor, when createFakeParserElement() tries to set align attribute for a comment. So the fix was done in file ckeditor/plugins/drupalbreaks/plugin.js in two places:

in function insertComment( text ) :
I changed this:

function insertComment( text )
{
  // Create the fake element that will be inserted into the document.
  // The trick is declaring it as an <hr>, so it will behave like a
  // block element (and in effect it behaves much like an <hr>).
  var fakeElement = editor.createFakeElement( new CKEDITOR.dom.comment( text ), 'cke_drupal_' + text, 'hr' );
  ...

to this:

function insertComment( text )
{
  // Create the fake element that will be inserted into the document.
  // The trick is declaring it as an <hr>, so it will behave like a
  // block element (and in effect it behaves much like an <hr>). 
  var realElement = new CKEDITOR.dom.comment( text );
    realElement.getAttribute = function() {
    return null;
  };
  var fakeElement = editor.createFakeElement( realElement, 'cke_drupal_' + text, 'hr');
  ...

and in function afterInit:
this

comment : function( value )
{
  if ( value == 'break' || value == 'pagebreak' )
    return editor.createFakeParserElement( new CKEDITOR.htmlParser.comment( value ), 'cke_drupal_' + value, 'hr' );

  return value;
}

to this:

  if ( value == 'break' || value == 'pagebreak' ) {
    var realElement = new CKEDITOR.htmlParser.comment( value );
    realElement.attributes = {
      'align':null
    };
    return editor.createFakeParserElement( realElement, 'cke_drupal_' + value, 'hr' );
  }
  return value;

Maybe it helps somebody