Comment 2 for bug 210142

It would be nice to be able to add/modify a bug fix on an old revision. Can this not be done in similar fashion that tags are handled?

Maybe these "changes" (comments that were modified, and fixes that were added etc) can be propagated by doing an update (on a checkout) and doing a merge on a branch.

In the case of merge, an option to include/exclude these changes can be given:
bzr merge <this> <other> --only-new-revisions
where --only-new-revisions will exclude the "changes" that was made to older revisions