New Custom Food page (web site)

When clicking the 'Add Food' or 'Add Recipe' from the Foods tab, the main content div does a really annoying left/right "shake" animation as if the user did something wrong.

Seems to do this on Firefox and Chrome. I'm not sure what the intent of this animation is, but I usually only see it on stuff like form submit buttons when a required field is missing, or similar (it's annoying then, too)