This is intended as a confirmation of this problem and what others have mentioned. I've added some additional information.

Best nodes for Day, Week and Month have three instances of:

Internal problem occurred in get_picked_nodes
called with 10 bind variables when 9 are needed
[download]

Best nodes for Year has different problems:

• First column with heading "#", which I believe used to have 1 to 20, now shows "1618135679" for all 20 rows.
• The next three columns ("Node", "Author" and "Rep") look normal.
• Column 5 with heading "CrDt" is new. It has the numbers 0 to 19 (increasing sequentially for each of the 20 rows). I don't know what this is supposed to be but is possibly related to what marto wrote.

Worst nodes has four instances of:

Internal problem occurred in get_picked_nodes
called with 10 bind variables when 9 are needed
[download]

This is what hippo reported.

I also got a lot of "500 Internal Server Error" messages when accessing a variety of pages. I managed to clear these with one or two refreshes. Some examples: "Worst Nodes"; "Newest Nodes"; "RFC: Better Best Answers Gets Real".