I encountered some strange behaviour in an app where mails are store (not a standard-mail-DB!). When the employee who is in charge of handling this mail tries to set the mail’s status to “done”, a copy of this mail is created, but the original mail remains in the same state & same content it was before.
There will be versioning involved if the mail was created from stationery – saving as stationery adds the version control fields to what was just a Memo document.