When using KDE with RH6.1, the open with function does not work correctly. The open with dialog open well but if one try to browse into the directory, you get only "This group is empty". My Redhat is a standard upgrade from RH5.2 with the RH6.1 CDROM. This problems exists even as root. Apparently, it does not occurs on a RH5.2 system with KDE1.1.2 installed from the KDE team rpms.
fixed for next release.