Missing packages when installing KarmicKoala Beta

["Thorsten Müller"]

I just wanted to install the Kubuntu 9.10 Karmic Koala for Beta testing.
I followed instructions here:
https://help.ubuntu.com/community/Ka...grades/Kubuntu

Everything went fine until it was nearly finished downloading packages.
Then it stopped, telling me that those upgrades could not be found:

p, li { white-space: pre-wrap; } Failed to fetch http://nl.archive.ubuntu.com/ubuntu/....88-2_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...untu1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...untu3_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...ta3-1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...ta3-1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...ta3-1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...ta3-1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...untu1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...ta6-1_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...904-4_i386.deb 404 Not Found
Failed to fetch http://nl.archive.ubuntu.com/ubuntu/...untu1_i386.deb 404 Not Found


My internet connection was working, there is enough diskspace etc.
Seems the packages are plainly not on the server.

No big issue for me, I just tried to test it a bit. But I wanted to send a bug report, and read the information here:
https://help.ubuntu.com/community/ReportingBugs

But I somehow got lost there, since I'm not sure which package is responsible for the problem. So I don't know how or where to report that as a bug.
Can somebody point me to the right place, please?

I posted the same question here:
http://ubuntuforums.org/showthread.php?t=1285704
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