Thread:Extension talk:WYSIWYG/Cancelling an edit causes a 404 page not found error due to the index dot php being removed from the URL/reply (2)

I also have exactly the same problem.

Mediawiki: 1.20.4 PHP 5.3.2 MySQL 5.1.67 WYSIWYG extension (version 1.5.6_0 [B551], CKEditor 3.6 (revision 6902))

Is this bug acknowledged and will a fix be released soon?

Regards.

J.