Ticket here - http://yuilibrary.com/projects/yui3/ticket/2527949
old pull request here - #34 (comment)
changed comparison to ===
Hi @redbat I wanted to update you on the status of this pull request. @davglass has this on his plate, but the merge process will be complicated, so he's planning to get to it but has not yet had time to pull it in. We're sorry for the delay, and I'll keep you posted on the status if I hear anything new.
I tried pulling this in, but it's so old that the code underneath is way different than it was in the beginning. I'm closing this for now, but I will leave the main bug open for a Loader refactor that's coming soon.