We need to be able to track the same fix that is to be applied to multiple
versions of a product.

Is there a simple bug-copy method that can do this - so each copy is linked?
The head copy can then contain the requirement comments, and the remainder
simply store the progress / change of status. The only difference between
the copies will be the version stamp - although in other situations the
project or O/S or some other feature may also be the variable among the
copies.

Or is there another way to do just this?