woothemes/woocommerce — pull request #4767 by coenjacobs (2014-02-13 07:53:30+00:00)
Title: Only check DOING_AJAX for AJAX requests

Not sure why, but some hosts are setting the HTTP_X_REQUESTED_WITH header for seemingly non-ajax requests. Could be MT, could be cloudflare, we don’t know.

I think is ready for the next maintenance release, @mikejolley?