I noticed this after the 3.8.1 upgrade.
The footer on this page is in the correct place:
But on this page it has extra space above it:
And on this page, waaaaaay too much space:
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?