Debian Wheezy with KDE

The right way to install KDE on Debian Wheezy is to start the right installer by choosing “KDE desktop” under Alternate Desktop Environments under Advanced Options in the CD boot menu.
If you haven’t done that, you’ll end with Gnome. In this case here is the cure:

sudo apt-get autoremove --purge gnome*
sudo apt-get install kde-standard