INavigationNode.getShowType() always returns 0

Hi,

if the users role contains a role folder or

a workset the method INavigationNode.getShowType()

always returns the value 0 (i.e. INavigationConstants.TYPE_IVIEW).

For a role folder I would expect INavigationConstants.TYPE_Folder and for the workset

INavigationConstants.TYPE_WORKSET.

Am I wrong, or is this a portal bug?

Best regards,

Rüdiger