Ubuntu Guide shows you how to upgrade to Xfce 4.11 in (X)Ubuntu 13.10, 13.04, 12.04, 12.10
Upgrade to Xfce 4.11 in (X)Ubuntu 13.10, 13.04, 12.04, 12.10
Upgrade to Xfce 4.11 in (X)Ubuntu 13.10, 13.04, 12.04, 12.10