netinstall problem -- corrupt alsa-utils-1.1.0-10.el6.i686.rpm?


I try to install from the netinstall iso file. Everything works as I
expect up to the screen where I have to choose between "Desktop",
"Minimal Desktop", "Minimal", etc.

If I choose either "Desktop" or "Minimal Desktop", I have a pop up
saying "Installation Starting" with "Starting installation process",
and, about a few seconds afterward, an "Error" pop up that says:

The file alsa-utils-1.1.0-10.el6.i686.rpm cannot be opened. This is
due to a missing file, a corrupt package or corrupt media. Please
verify your installation source.

If I choose "Minimal", this is the same except that instead of the
alsa*.rpm, it is iputils-20071127-24.el6.i386.rpm.

I have successfully used this installation procedure in the past,
literally tens times (last time in January). Since it says "verify
your installation source", I have now tried again with


on two different USB sticks, written with unetbootin and
livecd-iso-to-disk on two different computers. I also have a DVD with
some former CentOS version (perhaps 6.4).

I have tried the installation on 3 different computers (on one of
which the procedure worked in the past). Every time it is the same.

NB: during the installation process, the URL I enter is
<a href="" title=""></a>

Any "chance" there is a problem on the CentOS side?

Otherwise, what could I be doing wrong now?

Thank you very much.

Alain Cochard