It would be useful to be able to access the history of just the header-area, by itself, just as we can for a single topic.
This is especially important for being able to revert vandalism efficiently, or just to find the original/older wording. Currently it's awkward to page through the old diffs (alternately clicking "Version by ..." and "differences from ...")
[Note: this bug was originally to do with just making history accessible, which was done by adding the revisions into the Board history page. I think this re-purposing is more along the lines of what was wanted.]