Nice work, Pulcinella! Spread the word.
In the meanwhile I'll see if Microsoft's guys will take in account to modify the way taskbar notifications calls have to be handled since the actual protocol...

In the first solution the user makes a reboot at some point! This kills the named processes. He should reboot directly without all the other mess. :p
Are you sure this is a solution? ;) Will you...

That's it. After reading some threads on this I decided to invetigate deeper this misbehaviour (I recall this as a problem existing for ages in Windows) and understand this as a mere programming...