Freshly installed ocsigen silenty fails to start:
$ sudo aptitude install ocsigen
[...]
$ sudo invoke-rc.d ocsigen force-start
Starting ocsigen: ocsigen.
$ ps faux | grep ocs | grep -v grep
$ sudo tail /var/log/ocsigen/errors.log
2011-02-14 13:06:40 - Fatal - Findlib package lwt.ssl [while trying to load ocsigen.ext.staticmod] not found (Required by `ocsigen.server'): maybe you forgot<findlib path="..."/>?
Installing liblwt-ssl-ocaml-dev and restarting fixes the problem.
Better behaviour for the daemon would be to check configs before forking.