2.1.9 and 2.1.10 both fail to do post-install script (Mac OS X 10.7.2)

I've tried to install both 2.1.9 and 2.1.10 mac installers, but they both fail at the post-install script. Manually trying to run /bin/start from the terminal also doesn't work (it just stalls for several minutes, then launches safari with a failure page).

Anyone else having this problem?

Contents of the logs:

-----------
install.log
-----------
Executing final installation script
Error executing post installation script
/Applications/ejabberd-2.1.10/bin/postinstall.sh
\child process exited abnormally

-------------
ejabberd.log
-------------
=ERROR REPORT==== 2011-12-26 13:49:28 ===
Error in process <0.100.0> on node 'ejabberd@localhost' with exit value: {{case_clause,{error,{open_error,-12}}},[{ejabberd_app,init,0}]}

=INFO REPORT==== 2011-12-26 13:49:29 ===
application: ejabberd
exited: {bad_return,
{{ejabberd_app,start,[normal,[]]},
{'EXIT',
{badarg,
[{erlang,port_control,
[stringprep_port,2,"pc-7058.local"]},
{stringprep,control,2},
{jlib,nodeprep,1},
{ejabberd_config,normalize_hosts,2},
{ejabberd_config,add_hosts_to_option,2},
{lists,foldl,3},
{ejabberd_config,load_file,1},
{ejabberd_config,start,0}]}}}}
type: temporary