In Richfaces4, for toggling tree nodes, the attribue toggleNodeEvent="click" is used. And toggleType="ajax" is bby default.
I think by adding toggleNodeEvent="click", it will solve the issue.
thanks for the reply, but it doesn't work either, I've changed my code to use the
<rich:treeModelRecursiveAdaptor>, it works for all my browsers except IE9, it works with IE9 if i run it with the compatibility view.