i connt install - manual partation - apport problem

[david]

40 Gb
/boot 300 mb
swap 4 gb
/ 8 gb
/home 19 gb

ubuntu 11.10. intalalltion time appoet errors

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CasperVersion: 1.287
Date: Sat Mar 3 10:08:06 2012
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=en_IN
 PATH=(custom, no user)
 LANG=en_IN
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Mar 2 18:54:29 ubuntu plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Mar 2 18:54:29 ubuntu plugininstall.py:

[Brian Murray (brian-murray)]

A package became corrupted during the install process and subsequently the installation failed:

Mar 2 18:53:24 ubuntu ubiquity: Unpacking replacement ure ...
Mar 2 18:53:24 ubuntu ubiquity: xz:
Mar 2 18:53:24 ubuntu ubiquity: (stdin): Compressed data is corrupt
Mar 2 18:53:24 ubuntu ubiquity:
Mar 2 18:53:24 ubuntu ubiquity: dpkg-deb: error: subprocess <decompress> returned error exit status 1
Mar 2 18:53:24 ubuntu ubiquity: dpkg: error processing /target/var/cache/apt/archives/ure_3.4.4-0ubuntu1_i386.deb (--unpack):
Mar 2 18:53:24 ubuntu ubiquity: short read on buffer copy for backend dpkg-deb during `./usr/lib/ure/bin/uno.bin'