Worked smoothly in Chrome 31[1], on 32GB i7 3770K w/ GTX 680 graphics.

Upgraded to Chrome 32, noticed different scroll bars, and now it's jerky when scrolling.

Looks like a Chrome regression.

[1] I disable all 3 auto-update mechanisms Google uses on Windows: HKCU\..\Run, Task Scheduler tasks and gupdate* services. It's almost like a virus.

Might be a Windows issue; Firefox on Mavericks is working swimmingly.

I'm getting similarly horrible performance on Chromium what-I-assume-is-latest (32.0.1700.107) on Arch Linux; Firefox has no performance issues but doesn't actually render all of the CSS being showcased.

Mine's OK with an i5 and half that amount of ram, although it's not perfectly smooth. OpenGL in software maybe?

It works fine for me on nightly Firefox on Linux.

Crashed chrome on iOS7