I am in testing.
I did a new installation and after a single apt-get dist-ugrade, wich installed three new packages and updated about another forty,I lost my wifi internet connection again. Cable internet worked fine.
I suspect it has something to do with firmware-linux-free so I did an apt-get remove and I re installed the package firmare-realtek without luck.
I re-installed the last testing from scratch and I recovered wifi internet.