Correct me if I'm wrong, but I thought the rendering engine in Mango IE9 and desktop IE9 were supposed to be the same. Well, it turns out that Mango IE doesn't pass Acid2, while desktop IE9 does. I'm not sure if it was worse back in Nodo, but in this day and age, not passing Acid2 is pretty sad. The test itself is like 6 years old.
Even stranger is the fact that Mango IE9 does better than the desktop on Acid3, scoring 95 against the desktop's 90 (at least on my pc), but I know that Acid3 can be inconsistent at times.
