<img src="http://dl.dropbox.com/u/31590694/SalarymanTest.jpg" border="0" />
As the picture above.
I am trying to make a ragdoll.
Not like C1 BoneAnimation, a hinged ragdoll has no function to mirror/flip itself,
so I tried to set image width negative for mirroring the ragdoll parts manually.
That's why I set width negative in this case.
Now I know setting height/width negative is an illegal operation,
however, if you go image editor to set a physic-behavior-sprite mirror/flip,
like what I did in the picture, it would also cause the bug I've mentioned.
May C2 be the best!