Confirmed by Xbox boss Larry Hryb, the new policy of making all re-certifications free of charge applies to both Xbox Live Arcade games and full retail games.
There is, of course, some fine print. If developers are deemed to "make an excessive number of re-submissions due to an update failing certification, Microsoft reserves the right to issue a charge."
"Microsoft eliminated fees for Title Updates on Xbox 360 Arcade games in April 2013," a spokesperson concluded. "We're constantly evaluating our policies and implementing feedback. While our development policies are confidential, and will remain so, we're pleased to say that this is just one of many ongoing changes and improvements we've made to ensure Xbox is the best place possible for developers and gamers."