Unpacking libqt4-designer:i386 (from .../libqt4-designer_4%3a4.8.1-0ubuntu4.1_i386.deb) ...
xz: (stdin): Compressed data is corrupt
dpkg-deb (subprocess): subprocess data returned error exit status 1
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing /var/cache/apt/archives/libqt4-designer_4%3a4.8.1-0ubuntu4.1_i386.deb (--unpack):
 short read on buffer copy for backend dpkg-deb during `./usr/lib/i386-linux-gnu/libQtDesigner.so.4.8.1'