they are just not a dependency of yavdr-essential anymore. So normally these packages are removed only if "apt-get autoremove" is called (unless you set their installation status to "manual")(http://manpages.ubuntu.com/manpages/preci…apt-mark.8.html)
Ok, thanks for the info. I run from time to time an "apt-get autoremove" and "apt-get autoclean". So, that can be the explanation.
Thanks again.
jbjbjb