Some small changes were made on the Phorum internals to make it possible for these modules to cleanly change variables in the $PHORUM['DATA'] array. I just committed some changes to the Phorum tree and replaced the package files for these modules with new ones that properly support the latest changes.
If you are currently actively testing out 5.2 and these modules, then beware that the current modules only run with a recent snapshot of 5.2.