Heading without numbers

In OOo, write text using "Head 1" style. Use Backspace to remove the numbering. 
If you save in .odt format and then reload the .odt, the numbering is back. 
Nothing in the saved file indicates that the numbering is removed.
I think something is missing in the spec about this.

-- 
David Faure, , sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).