error from hop wizard

Hi all.

I am trying to use hop and bigloo from 2012-01-18.
Installation went smoothly.

Then, I try to setup hop as follows:
1.
start hop as a normal user:
> hop -g --repl

2.
fire up a browser (Konqueror 4.7.2):
> konqueror http://localhost:8080

3.
I enter the sections for admin, user, and guest (3 users in total).
When I press "Save", the browser presents the following server error:

localhost:8080
path:   /hop/wizard/save
Hop server stack:
*** ERROR:wizard/save:
Wrong number of arguments -- (wizard/save)
    1. &pool-scheduler1756
Hop client stack:
(hop_default_failure ...)
/usr/local/lib/hop/2.3.0/weblets/wizard/wizard.hop <at> 2261, (save-accounts ...)
(onclick ...)

Any ideas?