After online upgrade all is good on my LXDE machine, except that my home is chmod-ed 351 (-wx-r-x--x)! and at every reboot register.desktop, home.desktop and trash.desktop are recreated on ~/.Desktop
I've removed all my ~/.config/autostart and all the custom /etc/xdg/autostart/ entries, but I'm still unable to find the culprit (in the mean-time I've removed the .desktop files from /var/lib/mageia/lxde-profiles/Desktop-icons/)
Also, it seems like the rpm for NetworkManager is missing a require for polkit (in my case for lxpolkit too), "Failed to add/activate connection: (32) Insufficient privileges" is the message when the polkit "wrapper" does not exist.