Shopify/batman — pull request #746 by pushrax (2013-06-05 21:56:26+00:00)
Title: Fix race when multiple frame operations are occurring

Double clicking actions can result in `@_afterFilterRedirect` containing something when it shouldn't (caused a weird bug in Shopify).

This is one way of fixing that.

@hornairs need your input here.

cc/ @kristianpd