Created attachment 669379 [details] screen shot STR: 1. Open the page at the above URL. 2. Go to the end of the page. 3. Scroll up by holding down the up arrow key. 4. Notice that the box of sharing buttons on the left (LinkedIn, Twitter, etc.) leaves a few pixels on the screen whenever its position is updated to remain vertically centered in the window.
Seems to have been fixed.