This is what my my reputation page looks like when it first loads:
But if we unselect math.SE, we get a y-axis rescaling mess:
I'm using Firefox. I'm in China, so many things involving Google and Imgur are blocked, and I use Decentraleyes to stop the browser attempting to load unloadable Google objects.
I'm hoping other users can check whether or not this issue is localized to my system, and if it's not just me, here's the bug report.