So is the less frequently reviled Ctrl+F thing. Return to your preferred method of scrolling through this site. I appreciate your patience, and a big shoutout to Matt Cerrone for his heroic efforts in figuring that out.
UPDATE: The arrow-key thing is not fixed. I thought it was, and I swear it was working on my computer, but apparently it persists. Someday.
Tedquarters 
No dice on my computer. And I never knew of the Ctrl+F horror!
Really? What browser are you using?
Firefox but also tried it in IE. No luck.
Same here, i’m using chrome.
Balls.
Now it works for me.
I’m using firefox and it’s also not working.
Same here, using safari.
Firefox begs to differ.
WTF. Now it’s happening for me, too. It was totally working earlier, I swear. Dammit.
Am I the only one that likes the fact that tapping the arrow moves you directly to the next post? Sure it screws scrolling but I can do that with my mouse or trackpad.
Yes, I believe you are.