Problem solved, the solution:
Don't trust labels on disks. They often mix up architectures.
Don't trust labels on computers. They often do not only mix up
architectures but also send you into login into a virtual engine instead
of the real engine.
Don't trust jigdoed ISO-Images. Stupid people will have done stupid
things to the data before mkisofs, including but not limited to mixing
up architectures.
Final though: Even if your internet line is only 128kBit always download
official images.
--
Christian Brandt
life is short and in most cases it ends with death
but my tombstone will carry the hiscore