Right, just a short code-snippet I'd like to share for those who have been searching for a solution for ages (like I have). I was looking for a way to hide specific tabs in a TabNavigator in Flex 3 without removing a child form the ViewStack.
This is not possible by simply hiding a child in the viewstack (child.hide = true) or by setting its visibility to false (child.visible = false).
With an easy workaround you can set the visiblity of a specific tab to false:
Probably more people have found this solution, but I couldn't find it on the web so here it is.