I've just pushed HB-Cumulus 1.4 out the door. There's no major changes, only a bit of code tidying and I've now also made released a version that is compatible with Habari SVN (which will become 0.7 one day) which uses a new plugin architecture.
Downloads are on the HB-Cumulus project page.
As this is a new release, I've closed comments on the 1.3 post. If you encounter any problems, please ensure you update to rev 1.4 and if the problem still exists, leave a comment here.