Area51 has a reputation calculation problem.
Today I was at 175 rep. I opened http://area51.stackexchange.com/reputation saw a total rep of 160. I hit the "Trigger Reputation Recalc" Button and then it was in-sync again.
Rep before sync:
Rep after sync:
Why did I open the recalc page?
- I was a 168 rep.
- 2 of my example proposal questions got downvoted (164 rep)
- I deleted these 2 questions. I got only 2 rep back instead of 4.
Actually I can't really confirm that to 100%, but I think that happened. That is why I triggered the rep calc in the first place.
The reputation history does not show all entries I ever had, but this is another story.