DMlibMeshCreateXXXDecomposition() is "broken" (produces no decompositions at the moment),but the API compatibility is otherwise restored (relative to petsc-dev). I will work on finishing DMlibMeshCreateXXXDecomposition() work in the coming week or so. Note that there appears to be a regression on the petsc-dev side with respect to the VI solve, but I haven't had a chance to chase it down, yet.The symptom is this: miscellaneous/ex7 with -snes_type virs works fine with petsc-3.3 but doen't appear to work with -snes_type vinewtonrsls and petsc-dev, while the libMesh code is the same except for the DMlibMesh plumbing. I'll try to take a look at it when I have a free minute.
If there was a regression in PETSc, we need to have a better test.