Last modified: 2012-02-27 19:51:37 UTC
Closing the nearby map hides the map and doesn't actually close it. Upon choosing nearby again, it doesn't check for presence of an old instance, and instead re-adds another map layer to your view and showing them both.
[master 40048f7] bug 33974: reuse existing map view when re-showing nearby view, instead of creating a new tile layer