STS validator problem on dynamic transition target

[qs.dvogt]

When I use a dynamic transition target like

<transition on="back" to="#{myFlowAction.breadcrumbBack(myFlowBean)}"/>

STS web flow validator reports an error like:

Element transition references a non-exiting state "#{..."

If I use

<transition on="back" to="${myFlowAction.breadcrumbBack(myFlowBean)}"/>

the STS validator stops reporting that error, but I run in an exception:

Cannot find state with id '${myFlowAction.breadcrumbBack(myFlowBean)}'

Can we switch the EL? (and if so - to what?) Or can we reconfigure the STS SWF validator?

Thank you for any suggestion.

Regards.

[qs.dvogt]

This has been copied to the STS forum => http://forum.springsource.org/showth...nsition-target

(I would move it if I knew how)