I've used it before without any trouble, this is just a recent problem. I used to import custom track models for Mario Kart Wii with this method. Perhaps I'll have to go get COLLADAMaya and see if that works.

What is the optimal Collada version to be using when importing on 0.76b? I'm using Maya 2015 to export my models and they're breaking when I import into BrawlBox and I'm assuming it's just the wrong version of Collada.

(Mine's using 1.4.1)