There seems to be a number of problems with the new desktop menu: 1. The following directories are missing: KDE-Desktop.directory KDE-Security.directory KDE-Components.directory KDE-Hidden.directory 2. If one starts, say, Preferences-->Previews one gets an error message saying that libkcm_konq.la is missing and that this means we have something old lingering around. Among others giving the same error is also "Multiple Desktops" under LookNFeel. 3. In /usr/share/applications kde-panel.desktop and kde-panel-appearance.desktop have the same name Panels. This may be ok if they are to appear under different menu entries.
It's fixed in 3.1-0.9 or newer.