Evidently, the "fix" doesn't seem to have the intended effect. Launching Akregator just now spawned three "HTTP Cache Cleaner" instances and the animated cursor, with the plasma-desktop process increasing its activity.
I suppose it is possible that the referenced .desktop file is not involved, but the /usr/lib/kde4/libexec/kio_http_cache_cleaner program does seem to be invoked. Paul
