Krusader will not open in KDE4.1.1 Kubuntu 8.04
I tried to set Krusader as my default file manager. Now, when I try to click on a desktop folder, the bouncy icon jumps for about ten seconds, and then quits. Notably, this ALSO happened when I was using Mandriva 2008.1 and 2009 RC1; I think it has something to do with KDE4 itself. I can start Krusader fine with root privileges using "kdesu krusader" from the terminal, but it won't open from the application launcher either.
What am I doing wrong?