I performed a reputation recalc and my reputation dropped 50 points. Not knowing why that should be, I went to my reputation page and noticed that daily reputation was shown, but the triangles were not there to show the reputation breakdown for more than 2 days ago.
The graph does not show up on the graph page either; just a blank area where the graph might go.
Yesterday, I was looking through my reputation broken down daily to see when I had been awarded bounties, so the daily breakdowns were available yesterday. I would really like to know why I lost 50 points, and why the reputation breakdown is not currently available.
Here are a couple of screenshots:
Note that there are no expansion buttons (triangles) next to the daily totals for Jan 7 - Jan 15. The expansion buttons next to Jan 16 - yesterday are inactive (nothing happens when they are clicked).
There is no graph displayed.
Possible Resolution: After updating Firefox to 9.0.1, the problem disappeared.