Microsoft provides a converter to convert docx to earlier word versions.
http://office.microsoft.com/en-us/word-help/open-a-word-2007-document-in-an-earlier-version-of-word-HA010044473.aspx
Unfortunately the generated docx file leads to an error “Fehler beim Oeffnen der Datei” e.g. “There was an error opening the file” in Word 2003.
Opening the file which contains html in Office 2007 works.
If I save the file with Office 2007 I can open it in Office 2003.
as it seems, the html is not converted in a proper way, because also the example_html.docx is not working
if it is getting converted to office 2003.
I'm using ckeditor as wysiwyg editor.
and BTW, your forum has an error. It shows 1 replies even if there is no reply...