Well, my problem is exactly that I don't know how to narrow the list of suspects.

What I know is:

* it happens on both Fedora 16 64 and CentOS 6.2 64.
* on both these platforms I have had zero problems as long as I stick to morbo
* trying to run with hypnotoad gives zero output (apart from creating a hypnotoad.pid file), I mean zero. No logs (log dir exists, is writeable, debug level set), no console output.