|> man apt-get says: |> "An update should always be performed before an upgrade |> dist-upgrade."
I had done `apt-get update' before each attempted upgrade step. A number of people have been having these problems (judging by the list). I just kept trying, and eventually it half-worked (about half the files were downloaded before the 404 errors started coming again). I used `apt-get --fix-missing upgrade' to install what I could; waited a bit, `apt-get update' again; tried again; about half of the remaining files were downloaded before the 404 errors started coming. Installed what I could; waited a bit; tried again. And this time, all of the remaining files were downloaded. I think it took three tries; maybe it was four; but in all but the last, I got what looked initially like a normal download, and then a series of 404 errors. Some of the downloads were very slow (hanging for several minutes at the same point). Once I got the files, the upgrade was very smooth, Jim