Not sure if it is a bug or not, but it seems that marble_thumbnail_kml, marble_thumbnail_kmz, marble_thumbnail_osm and marble_thumbnail_shp .desktop files have missing “NoDisplay=true” in them?
Hi - hmm, yes I also notice that installing Marble places some entries into Lost + Found that don’t execute anything when clicked.
It looks like another user has already created a ticket in the KDE Bugtracking System regarding this issue, so any updates could be followed there: 497624 – Wrong .desktop file "ESRI Shapefile" placed in app launcher