Thread:Extension talk:WYSIWYG/IE11 with MW 1.22.0 + WYSIWYG extension: Existing category definitions will corrupt after after page has been saved/reply (10)

I had to add following code in function CKEditor_IsCompatibleBrowser of file ckeditor/ckeditor_php5.php (placed before last return false; -line) to make wysiwyg start in normal mode of IE11. Based on quick test, #6 bundle seems to work with normal mode of IE11 too. I am not expert on this field so it may be that rule to test version of IE11 is not perfect, but as it is last test of block it should not harm other tests in any way (+ there is always possibility to switch into compatibility mode if wysiwyg does not work in native mode of IE11 for some reason).

I do not have possibility to test this with IE9 or IE10 browsers.