Flo wrote: >> >> I don't know the timing, but I wonder if it could be as simple as >> mirror skew. >> > > Probably you are right. I did the right thing at the wrong time. And > spent hours on searching a problem which didn't exist. > > Nevertheless, thank you for your help. > > Flo. > > Also take a look into directory /var/lib/apt/lists/partial. There may be left some files. I had to remove them by hand. -- Regards, Jörg-Volker.