I can't confirm the issue, but after looking at kubuntu-default-
settings.postrm, the last line under *) does say Unknow. Next upload for
k-d-s should fix this.
** Changed in: kubuntu-default-settings (Ubuntu)
Importance: Undecided => Low
Status: Unconfirmed => Confirmed
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Unknow argument for postrm
https://launchpad.net/bugs/92794