It seems that spring artifacts are no more OSGi bundles (in 3.2.0.RELEASE and 3.2.1.RELEASE).
Yes, they will not add OSGi manifests in the spring artifacts on central maven repository. So, now spring OSGi modules are placed in EBR as noted in SPR-8903.
P.S. Per EBR-890, Spring Framework 3.2.0.RELEASE has been released on the SpringSource EBR.