Why is EditBone.matrix read-only? Didn't used to be in 2.4. I've learned few ways to convert matrix to bone base and tip information, but my animations are still broken because of wrong roll angles. If the Blender API allowed to just assign the matrix and have it do the math that would save me a lot of headache:
http://gamedev.stackexchange.com/questions/31959/getting-bone-base-and-tip-positions-from-a-transform-matrix