Please tell me how you successfully installed KDE on Ubuntu ! After I burnt
myself last month installing KDE on Linux Mint and failed to start it and
removed apparently useless KDE apps one by one and later regretted it because
most Gnome and KDE apps work in LXDE Desktop I installed KDE in a different way
under ubuntu Jaunty:

sudo aptitude install kubuntu-desktop

I thought it was as simple and safe as installing xfce by

sudo aptitude install xubuntu-desktop

or installing lxde by

sudo aptitude update
sudo aptitude install lxde

now it starts as Kubuntu and if choosing KDE as session it gives so many
errors I cannot remember them. KDE does not start. I will have to note the error
messages on paper.