installed ubuntu-desktop in kubuntu but it's not like a new ubuntu

i intalled kubuntu 10.01, then ugraded to kubuntu 12.04 then after a while i used sudo apt-get install ubuntu-desktop in order to have a desktop environment just like a brand new installed ubuntu 12.04, but some of nice visual effects-like workspace switcher or messages about connecting to a network or a vpn connection establishing or failing that show in the top right of screen and they blur when mouse hovers them....- do not show as they should and they're so much simpler :|