PoserPro-2014 computes magnets differently than previous versions.

As V4 uses a lot of build in JointSmootherMagnets (JSM) to help her bending, this causes her buttocks to enlarge instead of compress when you bend her legs.

So, bluntly said, PP-2014 breaks V4. (As well as all other figures using magnets for rigging)

SR1 gives you an additional magnet checkmark for the cr2, so you can disable the new magnet behaviour on a per figure base.

But it also introduces the mesh shading errors on certain figures as described above.