I got this error when installing Transmission and uninstalling some unused dependencies in LXDE:
/usr/share/menu/lxrandr: missing required tag: "section"
Skipping file because of errors...
Is this bad?
As far as I can see, it's just a packaging bug. Somebody munched the debian/menu file and forgot to copy it all over to lxrandr.menu.
The fourth comment gives you a way to fix this with a working menu entry. sudoedit /usr/share/menu/lxrandr and fill it with:
?package(lxrandr):needs="X11" section="Applications/System/Monitoring"\
title="LXRandR" longtitle="LXDE monitor configuration tool"\
description="LXRandR is a GUI application for the Lightweight X11 Desktop Environment (LXDE). It's a very basic monitor config tool utilizing the X extension called RandR to change the screen resolution on the fly."\
command="/usr/bin/lxrandr"