1) There are repeat selections for All/Year/Quarter/Month/Week, with nothing underneath them.
Selecting either of them will display the associated information.
Previously, each one of these was on a separate tab.
Would suggest either removing the non-default selected ones, default select "All" for all of them, or putting them back into tabs as they were before.
2) Selecting "Week" on the topmost selection (which I believe is for just pure reputation) does not show this week's highest reputation owners. Not sure what it displays -- people with the highest reputation gain in any given week? Easy to this if you visit some of the profiles, since they were last active several years ago.
Would expect this to show "top reputation gains in the last week". Similar for the other tabs.
3) I'm getting quite a lot of Mixed Content warnings on this page (various images served over HTTP instead of HTTPS).