Comment 22 for bug 236602

KDE does detect it and any KDE app would be able to access this data, so if fspot was a KDE application all this would work perfectly fine. But since fspot is a GNOME app it apparently relies on GIO to read the desktop-file database, which is not present, because KDE doesn't create or update that file since it is not even mentioned in any fd.o spec.

You have to get a different point of view on the issue: it's not about a GNOME app in KDE, it is about a GNOME app in an environment without desktop-file-utils, competely unrelated to KDE.