That output comes from /etc/lsb-release (on an Ubuntu-ish distro), what does your file say? It only affects steam.sh and different info is used in the survey.
You are right.
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=13.10
DISTRIB_CODENAME=saucy
DISTRIB_DESCRIPTION="Ubuntu 13.10"
But maybe that different info should be used when lauching steam. Somebody on kubuntu should fix this file.
Nothing extracted yet.
Not a major problem, but I think this might effect the random survey.
steam
Running Steam on ubuntu 13.10 64-bit
STEAM_RUNTIME is enabled automatically...etc etc
Kubuntu 13.10 64bit