Sophisticated transitional expressions Issue

Sophisticated transitional expressions do not work anymore.

Exception:

org.springframework.webflow.engine.NoMatchingTransitionException: No transition found on occurence of event 'next' in state 'traderUserGroup.view' of flow 'main-user-flow' – valid transitional criteria are array<TransitionCriteria>
[${event == 'review' || event == 'next'}

See http://forum.springframework.org/showthread.php?p=179825#post179825