Sanity Review in Overview shows '-1' while it's actually +2

Change http://codereview.qt-project.org/#change,13260 got a -1 from the 'Sanity Bot', which was however overwritten by another approver. Anyhow, the state in the overview page still shows 0, -1 for me! I already restarted my firefox + tried another browser, so it's most probably not a caching issue on the client side ...