Hibernate version: 3.2

A couple of questions:

First, how difficult is it to upgrade EhCache? I haven't been able to find any good documentation on this - is it as simple as replacing the ehcache-1.2.3.jar file with 1.2.4 or 1.3.0, or are there more steps that need to be taken? If someone could either walk me through the upgrade process or point me at somewhere that does, I'd be very grateful.

Second, I'm looking into possibly using Terracotta, especially for cache clustering (one of the reasons I need to upgrade EhCache from 1.2.3), since it seems to do a much better job making what's going on in the cache visible (I made a previous post about issues I've had with ehcache's remote debugger). Has anyone had positive or negative experiences with Terracotta? Any suggestions and/or things I should watch out for?