CKeditor loses focus on clicking on scrollbar in IE9, works fine in compatibility mode

[fay28]

CkEditor 3.x and CKEditor 4.x, all versions throw blur event on scrolling the editor area because the editor loses focus when scrollbar is clicked. It happens in IE9, but is not reproducible in compatibility mode.

[Jakub Ś]

1. I have checked this in latest CKEditor 4.2.1 in IE8-10.
2. I have set compatibility mode by using TOOLS->Compatibility Mode Settings->Dsiplay All Pages in Compatibility Mode.
3. In all browsers in both modes - blur was fired when scrollbar was clicked so behaviour is consistent.

I have used below code:

var editor = CKEDITOR.replace( 'editor1', {});
editor.on('blur', function(e){
	console.log('blur');
});

I'm closing this issue as I think it works ok. @fay28 if you don't agree, please leave a comment telling what is the proper way to reproduce this problem. If possible please provide sample and reduced HTML page that will show this issue.