Comment 76 for bug 60315

In my case this behavior began when I upgraded kdelibs5-plugins from 4.3 to 4.4, the strange thing is that this never happened to me before. As a side note, I use xfce in this computer, and all those hidden windows appear when I browse web pages in konqueror with the cache enabled.

Disabling TaskbarButton in the klaunchrc (as suggested in some blogs) does not work, and changing X-KDE-StartupNotify to StartupNotify in the services file didn't help either.

Besides that, the cache cleaner is not working, as it starts to grow well beyond the configured limit, even if I press the 'Clear Cache' button in konqueror's Preferences.

But if I start /usr/lib/kde4/libexec/kio_http_cache_cleaner & as a background process in a terminal, everything works nicelly, the cache works (without growing too much beyond its limit), and those annoying Launch notifications doesn't appear anymore...

So I guess the problem must be that konqueror or kio_http (I don't know) is not starting correctly the kio_http_cache_cleaner daemon. I've also tried making a wrapper for this application and it's ONLY run when the 'Clear Cache' button is pressed and with the '--clear-all' parameter.

I hope this helps in the understanding of the bug.