If it can be screwed up, I can do it. Ask laganon. The name sledgehammer has some history to it. When I, for example, get something off slacky.eu (?), never_stop_learning cringes. These problems are mine, not Vector's, though those following my travails might find them helpful on occasion to make Vector even more bullet-proof. My theory is that eventually one reaches a state where the mind starts to understand a little bit how software works...starts to see the big picture. Perhaps someday, my mind will get there. Its certainly not there yet.
Anyway, 99% of the errors went away when I did the update.
We have been trying (without success - he is quite crafty and resourceful) to restrict John's access to 'root' for years.....