This file is indexed.

/etc/X11/Xsession.d/51kubuntu-active is in kubuntu-active-default-settings 12.04.0ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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if [ -z "$KDEDIRS" ]; then
  export KDEDIRS=/usr/share/kubuntu-active-default-settings/:/usr/share/plasma-active-default-settings/:/usr/share/kubuntu-default-settings/kde4-profile/default/
else
  export KDEDIRS=/usr/share/kubuntu-active-default-settings/:/usr/share/plasma-active-default-settings/:$KDEDIRS
fi