Hi Gerard Brandon,
We have not tested the compatibility of the 3.2 modules with Sitefinity 3.1. There are many improvements in Sitefinity 3.2 and many dependencies that the new modules rely on. For example, Lists and Polls should work fine with 3.1 but the Generic Content based modules, as well as Images&Documents might not.
So, if you are not in hurry, we would recommend that you wait for the official release of version 3.2 and upgrade your project.
Let us know if you need any further assistance.
the Telerik team