Gideon Stevens on "[Theme: Twenty Thirteen] random space above footer"

I noticed this after the 3.8.1 upgrade.

The footer on this page is in the correct place:
http://hashtagtopics.com/kongos-come-now/

But on this page it has extra space above it:
http://hashtagtopics.com/life-purpose-5-minutes/

And on this page, waaaaaay too much space:
http://hashtagtopics.com/close/

I am using a child theme, but I temporarily reverted to off-the-shelf-2013 and it didn't change.

This happens on other pages as well. Some are correct, some have extra space. I don't think I'm doing anything different on these pages, why am I getting variable results?