Get:22 http://security.ubuntu.com dapper-security/multiverse Packages [2043B]
99% [21 Packages bzip2 0] [22 Packages 839/2043B 41%]                               10,3kB/s 0s
bzip2: Compressed file ends unexpectedly;
        perhaps it is corrupted?  *Possible* reason follows.
bzip2: Inappropriate ioctl for device
        Input file = (stdin), output file = (stdout)

It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.

You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.

Err http://security.ubuntu.com dapper-security/multiverse Packages
  Unterprozess bzip2 ist mit einem Fehlercode zurückgekehrt (2)
Hole:23 http://security.ubuntu.com dapper-security/universe Packages [10,5kB]
821kB wurden in 1m19s heruntergeladen (10,3kB/s)
Paketlisten werden gelesen... Fertig
W: Duplicate sources.list entry http://de.archive.ubuntu.com dapper/multiverse Packages (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_dapper_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://de.archive.ubuntu.com dapper/universe Packages (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_dapper_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://de.archive.ubuntu.com dapper-updates/multiverse Packages (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_dapper-updates_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://de.archive.ubuntu.com dapper-updates/universe Packages (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_dapper-updates_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com dapper-security/multiverse Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_dapper-security_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com dapper-security/universe Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_dapper-security_universe_binary-i386_Packages)