Too much recursion gwt error with the 7.4 release candidate

[FearlessHyena]

Hi I know 7.4 hasn't been released yet but the 7.4.0.rc1 is out and looking at the Vaadin milestones it'll be out within the next week or so and thought I'd still report it
When I compile the ContextHelp with this version and try to use it with my TextField the help popup doesn't show up and I see this error in Firebug (testing on firefox)

too much recursion com.google.gwt.event.shared.UmbrellaException: Exception caught: (InternalError)

followed by a long stacktrace (I can provide that if you need)
When I switch to 7.3.10 it works fine