Version: (using KDE 4.1.1) OS: Linux Installed from: Unlisted Binary Package In kde4 there are two file managers: Konqueror and Dolpin so there should be a possibility to choose the default one in systemsettings' "Default Applications" component.
Here using: Qt: 4.4.3 + qt-copy-patches-889120 KDE: 4.1.86 (KDE 4.1.86 (KDE 4.2 >= 20081221)) kdelibs svn rev. 903064 / kdebase svn rev. 903064 on ArchLinux x86_64 - Kernel 2.6.27.10 You can select both Dolphin or Konqueror, and also a custom app (configuring the apps for opening the "directory" mimetype)