Looks like it's affecting all types of rankings. Global, Board, Tournament...
I'm sure tom you're aware of the issue. Looking at the players who have rankings may help narrow the timeframe down. For example, the only two players with tournament rankings finished their game at 06:38 Eastern US time. (silkswan and colonia).
Where are all my points gone ?
Looks like the overnight reindex failed - they will be back shortly.
I noticed yesterday that I got my 150th WG win and it was a Gunslinger game that also put me at 1200 points on that board for 4 CPs. After the stats came back this morning, I noticed that I had only 149 wins and think that I somehow lost a Gunslinger game that I won from my stats (as my ranking on that board was not 1200, but 1184 or 1186 - I forget which now).
This isn't a big deal - but thought it may impact others (perhaps more than one game too) so I wanted to point it out in case there is anything that can be done about it.