I stumbled over the same problem as previously others had, namely that t:panelNavigation2 multiplies navigationMenuItems on postbacks if the state is held on the client.
There is a JIRA ticket open for this issue (and a few older threads): https://issues.apache.org/jira/browse/TOMAHAWK-508 Does anyone know what the current state is? As it is quite old, can it not be expected to be fixed in the near future or is there a workaround (besides setting the state saving to SERVER :))?
