PNG Rotation

Ok, I’ve got the following PNG in my flash file:

Everything looks fine until I decide to rotate it a tad, like this (notice the edges aren’t smooth anymore):

Now if I rotate it even more, the edges become smooth again and it looks good:

Anyone know any workaround for this? I really don’t want to import the image already rotated cause I need a bunch of different copies of same image but with different rotations. By the way, I tried rotated it through actionscript and it gave me the same results.