As I mentioned before, I installed the beta version of Ubuntu 22.04 LTS on the same system where I had installed Slackware 15.0. The official release of that version of Ubuntu is out and I have accordingly upgraded that system. A few things that I have noticed so far:

• The bugs I notice in the beta version are gone.
• gparted does not work. Nothing happens when you click on the icon. If you go to a terminal window and run gparted & you get the message cannot open display. Apparently this is because Ubuntu 22.04 uses Wayland rather than Xorg as its default display server. Apparently there are some ugly workaround to get gparted to work under Wayland, or you could simply log on with Xorg. I can live with this. When I am serious about using gparted I am usually booting from my Boot Repair drive, since you cannot do much with gparted on a drive that is currently in use.
• I downloaded pCloud, but when I tried to run it I got these messages:

      mcdavid@Tyrone:~$ pcloud
      dlopen(): error loading libfuse.so.2
      
      AppImages require FUSE to run. 
      You might still be able to extract the contents of this AppImage 
      if you run it with the --appimage-extract option. 
      See https://github.com/AppImage/AppImageKit/wiki/FUSE  
      for more information    
  

  This did not happen with Ubuntu 20.04. A quite search led me to Setting up FUSE 2.x on Ubuntu, Debian and their derivatives, where recommended:

      > sudo apt-get install fuse libfuse2
  
      > sudo addgroup fuse
      > sudo adduser $USER fuse
  

  Followed by logging off and logging back on again. This worked, but I am puzzled by why FUSE was not present by default, as it apparently was in 20.04.