This bug apparently was caused by a bad mirror (http://1und1.de), which I cannot find in the list for choosing a mirror within the installer anymore.
So closing this long-standing bug. Holger -- Holger Wansing <hwans...@mailbox.org> PGP-Fingerprint: 496A C6E8 1442 4B34 8508 3529 59F1 87CA 156E B076
