Duplicates used to be handled by the system putting some markup in the question body, like so:
> **Possible Duplicate:** > [Title of the Duplicate Question](http://superuser.com/) <!-- End of Automatically Inserted Text -->
Obviously this is handled differently now, but a lot of these questions still remain.
Is it possible to convert them to the new way of doing things? Will removing the body text auto-update the duplication and put the newer, correct box in? Or is there another way to kick-start this process?
Side note: One thing I discovered when editing as part of the Manufacturer cleanup is that people with < 2k rep (like me!) cannot simply suggest an edit to change/remove a tag on duplicate questions, which isn't fun, as sometimes there really is nothing else wrong with the question.