The problem reported here and in most of the comments is that KNetworkManager doesn't allow you to select TKIP, which is the same as bug 105899. Network-manager supports it, knetworkmanager is just missing the option, so this is "Invalid" for network-manager, and a duplicate of bug 105899.
If you have trouble connecting for a different reason (i.e. different solution/workaround) please look for and/or file another bug.
The problem reported here and in most of the comments is that KNetworkManager doesn't allow you to select TKIP, which is the same as bug 105899. Network-manager supports it, knetworkmanager is just missing the option, so this is "Invalid" for network-manager, and a duplicate of bug 105899.
If you have trouble connecting for a different reason (i.e. different solution/ workaround) please look for and/or file another bug.