This person can edit the page, but as long as the page hasn’t been approved, the old version is still visible.
I would also like a solution to this problem. chloraldo, have you found anything yet?
Are there any other ideas? Perhaps a new “future revision” of the page could be made and once an editor or admin approves the page, the “future revision” becomes the live page. Or instead of “future revision” a draft or other saved copy might work too.
