[Seaside] defaultAction not working?

[Esteban Lorenzano]

Hi,
I'm using Seaside 2.8 and Scriptaculous latests packages (tbn.539 and 
lr.238 respectively) on a Squeak-dev from dammien cassou, based on 3.10 
version.
Some component does this:

	html form
		defaultAction: [ self notifyChanges ] ;
		with: [ 
			html select
				labels: [ : each | each name ] ;
				list: aPlayer allStars ;
				beSubmitOnChange ;
				on: #currentStar of: self ]

When I run the code, everything works: list is render and form is 
triggered when I change some selection, but defaultAction is never 
called (tested on Safari and Firefox browsers).

I'm missing something?

Thanks,
Esteban