just to make sure, I tried an usb stick for install media.
(should not be doing this, what's the point of having a good pxe
bootserver?)
Anyhow, the daily netinstall iso
(http://cdimage.debian.org/cdimage/daily-builds/daily/arch-latest/i386/iso-cd/debian-testing-i386-netinst.iso)
works like a charm.
The daily netboot mini iso
(http://d-i.debian.org/daily-images/i386/daily/netboot/mini.iso)
suffers from the same issue.
I said that I have to purge both debian-archive-keyring and apt after
reboot. That is not the case.
Only apt has to be purged. Reinstall does not do the trick.
After reboot (using pxe bootserver and switching mirrors twice during
installation) I get this error doing apt-get update:
W: GPG-fout:http://ftp.nl.debian.org wheezy Release: De volgende
ondertekeningen waren ongeldig: BADSIG AED4B06F473041FA Debian Archive
Automatic Signing Key (6.0/squeeze) <ftpmaster@debian.org>
These are the two mirrors:
ftp.nl.debian.org
ftp.uni-erlangen.de
Also interesting, a part from the install log:
Mar 19 15:41:57 base-installer: :
Mar 19 15:41:57 base-installer: Release file for
http://ftp.uni-erlangen.de/debian/dists/wheezy/InRelease is expired
(invalid since 3d 19h 20min 43s). Updates for this repository will not
be applied.
Mar 19 15:41:57 base-installer:
Mar 19 15:41:57 base-installer: warning: apt update failed: 100
I attached the log to this message.