I finally managed to perform a whole upgrade of the system, excluding the infamous xorg updates that were trashing my machine via YUMEX. On reboot all went ok and I managed to login back into my account. I then opened a terminal and issued the command YUM UPDATE to check if other updates were available and to my surprise YUM reproposed all the updates that I installed 10 minutes previous. I checked whether the situation was the same with YUMEX and found out that there were no updates according to YUMEX (only the xorg ones) I then tested the same with Synaptic and got again all the updates that I already installed, ready to be re-installed. I do no really understand what's happening. Can anybody shed some light on to this dark tunnell? Thanks Mirco