Toolbar stops functioning inside JqueryUI dialog

[Daniel]

When using a jquery ui dialog (​http://jqueryui.com/dialog/#modal-form) after you open the dialog and click on a menu item the second time that it is clicked it doesn't work.

This seems to be limited to the Styles,Normal,Font,Size toolbar items, things like Bold,Italic, About etc seem to work still.

See attached for an reproducible sample, the form that isnt part of the dialog works correctly and the other form when the same menu item is selected again when it is still selected a javascript error is thrown.

That error is

TypeError: $.contentWindow is null
file:///C:/Users/Daniel/Desktop/New%20folder/ckeditor/core/selection.js
Line 1266 

I have tested this against the latest nightly (05-May-2013 at 07:41 UTC) and against the latest stable (4.1.1) and the latest from github (ckeditor-dev) master 2f39835f702191bf51cf5b238088ea0198f40959

[Daniel]

Looking at it today the actual error I'm getting is

TypeError: $.contentWindow is null ​file:///C:/Users/Daniel/Desktop/Example/ckeditor/core/dom/element.js Line 1621

 getFrameDocument: function() {
    var $ = this.$;
    try {
        // In IE, with custom document.domain, it may happen that
        // the iframe is not yet available, resulting in "Access
        // Denied" for the following property access.
        $contentWindow.document;
    } catch ( e ) {
        // Trick to solve this issue, forcing the iframe to get ready
        // by simply setting its "src" property.
        $.src = $.src;
    }
    return $ && new CKEDITOR.dom.document( $.contentWindow.document );
},

return $ && new CKEDITOR.dom.document( $.contentWindow.document );

is the line the error is occuring on

[Jakub Ś]

DUP of #10269.

This is jQuery bug. You can either use older version of jQuery and jQuery Ui or try using "$.widget( ..." workaround mentioned in that ticket and in ​http://bugs.jqueryui.com/ticket/9087 or ​http://bugs.jqueryui.com/ticket/4727.