A (standard KDE 1.1) problem occurs when korganizer is left on the desktop. At session startup an error window about not loading the file "korganizerrc.1" appears and korganizer then always starts with an empty calendar file. From the KDE/Korganizer mailing list I remember Preston knows about a fix for this. It would be great to have this in RH 6.0 ;-).
this will be fixed for the release. It is already fixed internally.