Sorry for my late response. I can confirm that mdadm version 3.2.5-1ubuntu0.2 is now working for both the latest kernel in precise (3.2.0-27-generic) and the upstream kernel 3.5.0-6-generic.
Sorry for my late response. I can confirm that mdadm version 3.2.5-1ubuntu0.2 is now working for both the latest kernel in precise (3.2.0-27-generic) and the upstream kernel 3.5.0-6-generic.