$ kbuildsycoca
kbuildsycoca running...
Reusing existing ksycoca
kio (KService*): WARNING: Invalid Service : media_realfolder.desktop
kio (KSycoca): ERROR: No database available!
kbuildsycoca: WARNING: 'kfile_media.desktop' specifies undefined mimetype/servicetype 'media/gphoto2camera,media/camera_mounted,media/camera_unmounted'
kbuildsycoca: WARNING: '/home/david/.local/share/applications/gxine.desktop' specifies undefined mimetype/servicetype 'misc/ultravox'
kbuildsycoca: WARNING: 'knotify.desktop' specifies undefined mimetype/servicetype 'KNotify'