Well, it depends on how did the whole upgrading process looked like... Were KDE3.2 packages uninstalled? If not, then you have to do it by yourself and carefully. Run rpm -qa|grep 3.2 to see if kde3.2 packages are present on your system. Before uninstalling them, though, I'd advise finding where theese 3.4 were installed and running kde from them manually (you'd probably have to change some paths to achieve that) to see if the installation is correct, as you're using unofficial repository with unofficial packages.