In the bottom right part of the History View user can select which items are included in the list view: Tags, Open Heads, Open Branches, Closed Branches and Bookmarks. When I change the set of active checkboxes, I would expect the app to remember my choice after app relaunch, so I don't have to reset them each time. In current version, this doesn't seem to happen.
Current version: MacHg 1.0.0Beta3 / 976edba49c6a
OS X: 10.7.3