kicker error messages about the io-slave

[pol]

A kicker error message series (from the .xsession-errors file) has the 
following form:

  kicker: ERROR: : couldn't create slave : Unable to create io-slave:
  klauncher said: Unknown protocol ''.

I cannot tell whether it is related to any misbehaviors. Anyway it is an
ERROR, so it shouldn't happen.
Any checks to find out its cause?

thank you 

--
Pol  



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