svn 38162M

Open the attached file.
There are two bones.
Y scale of the green bone is controlled through a Transform constraint with the grey bone as source.

Mapping is as follows:
Source range -1 to 1 maps to destination 0 to 2
so theoretically, scale should be mapped like this:
(grey bone source -> green bone destination)
-1 -> 0
0 -> 1
1 -> 2
actually, it maps like this
-1 -> 2
0 -> 1
1 -> 2

So for the negative values, the absolute value is calculated before mapping, instead of a linear transformation as would be expected. It is not possible to use negative scaling of the source at all.

same problem occurs for all axes.