Whenever I restart the system, as well as when i do various other things, I get this message:

"Unable to create io-slave. Unknown protocol "konq"."

Sometimes Konqueror starts without an explicit command from me. I also notice some misbehaviour in Dolphin:
when moving a file to a new folder, the original folder is not refreshed, but still shows the file.

As I know nothing about io-slave protocols, I don't know if this is something I could fix.

Any suggestions?