When I'm sculpting this mesh with multires I have obtained a lot of problems. In general I see to errors, this first is the deformed mesh, like lines in the shoulders (near to the breasts), like you can see in the subdivision level 2 and 3, and this don't appear in 1 o 4. It don't have any reason, and if for example you solve the problem with smooth in level 3, it appear in the level 4, and if you resolve this in the 4, it happens again in the level 3. This make really hard to sculpt. I only see a "temporal solution" using the "apply base" command. But this not work properly and sometimes deform the mesh.
The other problem is in the parts where the mesh is touching itself (in the elbow of the left arm). The mesh make strange form, like spikes with the polygons. If you try to solve the problem in all levels, for example in the level 1, then you make the same with level 2, 3 and 4. If you go back to level 3, the problem appear with a different shape.
It happens in differents PC, with windows, OSX... but where I have seen clearly is in my PC in the office with Windows 7 64bits, Nvidia GTX 960, and the last release version of blender 2.77. And some partners have told me that they seen the same problem since a lot of time.