Whenever SVG rendering engines come up, sooner or later the question of "which part of the SVG spec does it render incorrectly?" comes up. How does this one fare?

I get the impression that often these rendering bugs are partially caused by old optimizations that break later spec changes or missed some edge cases the first time around, so I hope that means this engine does better than most because it's more recent, built from-the-ground-up and can learn from the mistakes of others.