I'm not sure if there is a reason why the naming convention changed in this release but I thought I might save someone else a headache if they are trying to upgrade.
I tried changing my version to 3.6.1-Final but that didn't work. Instead of a - "dash" before Final, it is now a . "period"

So:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.1.Final</version>
</dependency>

Now if I can just figure out whether I'm supposed to use hibernate-core or hibernate-entitymanager or both... I'm using Spring 3.0.5.RELEASE with Hibernate / JPA.

If you're using JPA you need hibernate-entitymanager as well as hibernate-core.