Hi,
The scale function seems has bug.
The same project in 1.9.06 and 1.9.05 has different behavior. I'll use the attached image to show it.
In the 1.9.05 when I scale the x with -1.0 everything works fine.

But in 1.9.06, there seems a problem, as the attachment(the image) will not scale with bone

Would you help us to fix it?
Thank you.