When all the children are gone the folder icon does not change. If I walk the collection and then force the children = null, then the folder changes to a sheet (leaf) icon, as you would expect by looking at the HierachicalCollection class. However when I go to add a new leaf to the summary folder the folder reappears and the down arrow opens indicating that it's got a child, but the child does not render. Has anyone else seen this behavior. If this is a generic Flex tree data question, then any ideas on what keywords I should use to search for clues on why this is happening?
I've attached a test case. Any insight would be much apprecited.